Lock system

Abstract

To provide a lock system which can fix an object to a floor with a simpler structure while allowing change of an arrangement position and a direction of the object.SOLUTION: A lock system 10 includes: first rails 1a extending along a floor 30; lock parts (lock units 2) each of which is provided at a seat pedestal part 6 so as to lock on the first rail 1a and may adjust a position of the seat pedestal part 6 on the floor 30 in a rail length direction by selecting a lock position on the first rail 1a; a revolving part 6a which revolves the seat pedestal part 6 around a first vertical axis 6c relative to the floor 30 in a release state of the lock part; second rails 1b spaced apart from the first rails 1a and extending along the floor 30; and a lock position adjustment part (lock unit 2) which corrects misalignment between the lock part and the second rail 1b caused when the seat pedestal part 6 is revolved around the first vertical axis 6c to a lockable position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a locking system for locking an object to a floor. [Background technology]

[0002] Conventionally, there are known techniques for locking an object such as a seat to a floor. For example, Patent Document 1 discloses a technique for changing the position and orientation of a seat and fixing it to the floor of a vehicle. Specifically, rails are laid on the side walls of the vehicle, and the seat is attached in a cantilevered manner to the rails. The seat is able to slide along the side walls. A rotating support base is also provided so that the seat can be rotated to change its orientation.

[0003] The locking system includes a locking device (positioning hole 48 and locking pin 49 of guide rail 40) for fixing the seat so that it does not slide, and a locking device (engaging groove 62 of inner ring 60 of rotating support base 6 and stopper pin 91) for fixing the seat so that it does not rotate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-008219 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology disclosed in Patent Document 1 has a problem in that the structure is complicated because the locking device for sliding movement and the locking device for rotation are different. Therefore, the present invention aims to provide a locking system that can change and fix the placement position and orientation of an object on a floor with a simpler configuration. [Means for solving the problem]

[0006] To solve the above problems, the locking system of the present invention employs the following means.

[0007] That is, the first invention of the present invention is a locking system for locking an object to a floor, comprising: a first rail extending along the floor; a locking unit attached to the object so as to be lockable with the first rail and capable of adjusting the position of the object on the floor in the rail length direction by selecting a locking position relative to the first rail; a swivel unit which rotates the object about a first vertical axis relative to the floor when the locking unit is in an released state; a second rail extending along the floor away from the first rail; and a lock position adjustment unit which corrects any misalignment between the locking unit and the second rail when the object is rotated about the first vertical axis to a lockable position.

[0008] According to the first aspect of the present invention, an object can be slid along the first rail and rotated. The locking unit used to lock the object to the first rail is also used to lock the object to the second rail, and any misalignment of the locking unit relative to the second rail is corrected by the lock position adjustment unit. This allows the object's position and orientation to be changed and fixed relative to the floor with a simpler configuration.

[0009] A second aspect of the present invention is a locking system according to the first aspect of the present invention, wherein the lock position adjustment unit has a turntable that rotates around a second vertical axis that is spaced apart from the first vertical axis, and the lock unit is attached to the turntable at a position eccentric to the second vertical axis, thereby adjusting the orientation of the lock unit relative to the object and its distance from the first vertical axis as the turntable rotates.

[0010] According to the second invention, the orientation and distance of the locking part are adjusted simultaneously, so the mechanism of the locking position adjustment part can be made simpler compared to a configuration in which, for example, first only the orientation of the locking part is adjusted using a turntable, and then the turntable is slid to adjust the distance.

[0011] A third aspect of the present invention is a locking system according to the first or second aspect of the present invention, wherein the first rail and the second rail have the same rail structure in which the locking portion is fitted from above the rail in a direction extending in the rail length direction and a locking piece rotated around a third vertical axis inside the rail is hooked and locked, and the lock position adjustment portion adjusts the orientation of the locking portion relative to the object and its distance from the first vertical axis.

[0012] According to the third aspect of the present invention, the locking portion can be locked directly to the second rail without providing a striker that protrudes from above the floor on the second rail.

[0013] A fourth aspect of the present invention is a locking system according to the third aspect, wherein the first rail and the second rail extend parallel to each other and the locking portions can be locked at equal, constant intervals along the rail length.

[0014] According to the fourth aspect of the present invention, the locking portion can be locked to the second rail by rotating about the first vertical axis from any locking position where the locking portion is locked to the first rail. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a locking system. [Figure 2] FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Figure 5]10A and 10B are diagrams for explaining a sliding mechanism of a swivel portion. [Figure 6] 10 is a view showing the main parts of the seat base when locked to the rails. FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 10 is a bottom view of the lock unit with the turntable rotated. [Figure 10] 9 is a cross-sectional view taken along line XX in FIG. 8. [Figure 11] 10A and 10B are diagrams illustrating a state in which the vertical direction restricting portion is pushed downward. [Figure 12] FIG. 10 is a view showing the main part of the lock unit when locked to the first rail. [Figure 13] FIG. 10 is a diagram showing a main part of a lock unit before positional deviation correction. [Figure 14] 10A and 10B are diagrams illustrating the main parts of the lock unit after positional deviation has been corrected. [Figure 15A] 10 is a cross-sectional view of the main part in a state where the lock piece is positioned behind the narrow portion. FIG. [Figure 15B] FIG. 10 is a plan view of the main part with the lock piece positioned behind the narrow portion. [Figure 16A] 10 is a cross-sectional view of the main part when the lock piece is disengaged from the first recess. FIG. [Figure 16B] 10 is a plan view of the main part when the locking piece is disengaged from the first recess. FIG. [Figure 17A] 10 is a cross-sectional view of the main part when the lock piece is housed in the first recess. FIG. [Figure 17B] 10 is a plan view of the main part when the lock piece is housed in the first recess. FIG. [Figure 18A] FIG. 10 is a cross-sectional view of the main parts of the locking device and the rail in an unlocked state. [Figure 18B] FIG. 10 is a plan view of the locking device and the main parts of the rail in an unlocked state. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, directions such as front, back, up, down, left, and right refer to the directions shown in each drawing. In the following description, when a specific reference drawing is not shown or when there is no reference symbol corresponding to a reference drawing, any of Figures 1 to 19 will be referred to as appropriate.

[0017] (Outline of Lock System 10) As shown in Fig. 1, the lock system 10 is a system for locking a seat 20 to a floor 30. Specifically, the lock system 10 locks the seat 20, which is integrated with a seat base 6, in a predetermined position and orientation on the floor 30. The seat 20 has a seat back 21 and a seat cushion 22.

[0018] The seat base 6 is a base that becomes one with the seat 20 when the seat 20 is attached, and has a swivel portion 6a and a leg portion 6b extending from the attachment base 6h. The leg portion 6b can be locked to the floor 30 by the lock unit 2. When the lock unit 2 is in the unlocked state, the swivel portion 6a rotates the seat base 6 around a first vertical axis 6c relative to the floor 30. The seat base 6 can rotate 360 ​​degrees with the first vertical axis 6c as the rotation axis.

[0019] A plurality of rails, including a first rail 1a and a second rail 1b, are laid on floor 30. The rails extend parallel to one another, and the distance between adjacent rails is the same. First rail 1a and second rail 1b are made of rail components of the same shape.

[0020] The seat base 6 is rotatable about a first vertical axis 6c and is also slidable along a rail on the floor 30. That is, the swivel portion 6a is provided with a sliding mechanism for sliding against the rail, and the legs 6b are provided with a sliding mechanism for sliding against the surface of the floor 30. Therefore, the seat base 6 can slide along the rail on the floor 30 while remaining in the orientation shown in FIG. 1 (the orientation in which the seat 20 faces forward), for example.

[0021] As shown in Figures 2 to 4, each rail 1a, 1b is made of an extruded member having a U-shaped cross section. Specifically, each rail 1a, 1b has eave-like protrusions that jut inward from both ends of the U, with an opening formed between these protrusions that penetrates the rail in the height direction. The opening of each rail 1a, 1b is shaped so that narrow portions 1c with narrow opening widths and fitting holes 1d with wide opening widths are alternately arranged in the rail length direction.

[0022] Specifically, the fitting holes 1d are circular holes provided at regular intervals along the rail length, with narrow portions 1c where the groove width narrows between adjacent fitting holes 1d. As mentioned above, the first rail 1a and the second rail 1b are made of rail components of the same shape, so the spacing between the fitting holes 1d in the first rail 1a and the second rail 1b is the same.

[0023] As shown in FIG. 5, the sliding mechanism of the swivel portion 6a relative to the rail includes an engaging protrusion 6d, a retaining portion 6e, and a sliding portion 6f on the contact surface of the floor 30 of the swivel portion 6a.

[0024] The sliding portion 6f is shaped so that it always fits into the groove of the first rail 1a and can slide along the bottom surface of the rail in the rail length direction. The retaining portion 6e, like the sliding portion 6f, always fits into the groove of the first rail 1a and can move in the rail length direction and up and down. The retaining portion 6e is shaped so that when it is moved upward while positioned behind the narrow portion 1c, it interferes with the narrow portion 1c. The engaging protrusion 6d has a loose fit with the fitting hole 1d and can move up and down. The engaging protrusion 6d is inserted into the fitting hole 1d from above when the swivel portion 6a is fixed in the rail length direction.

[0025] To slide the swivel portion 6a along the first rail 1a, the engaging protrusion 6d is removed from the fitting hole 1d, and the retaining portion 6e is slid along the bottom surface of the rail. Then, with the retaining portion 6e positioned behind one of the narrow portions 1c, the engaging protrusion 6d is inserted into the fitting hole 1d. This causes interference between the engaging protrusion 6d and the fitting hole 1d, restricting movement of the swivel portion 6a in the rail length direction. Furthermore, by moving the retaining portion 6e upward and maintaining it, the retaining portion 6e comes into close contact with the narrow portion 1c from the back side, preventing the retaining portion 6e from wobbling up and down relative to the floor 30.

[0026] The lock unit 2 (lock system 10) is provided on the leg 6b of the seat base 6 so as to be lockable with the first rail 1a. The position of the seat base 6 on the floor 30 can be adjusted in the rail length direction by selecting the lock position relative to the first rail 1a. Locking and unlocking of the lock unit 2 will be described in detail later.

[0027] (Lock unit 2 configuration) 7, the lock unit 2 has a locking device 3 that locks the leg 6b to the rails 1a and 1b, and a bracket 7 that supports the locking device 3. The locking unit 2 is attached to the leg 6b of the seat base 6 by the bracket 7 so as to be slidable in the up and down direction.

[0028] As shown in FIG. 6, the seat base 6 is selectively locked to either the first rail 1a or the second rail 1b by the lock unit 2. Specifically, by unlocking the seat base 6 from a state locked to the first rail 1a, it can be rotated about the first vertical axis 6c to a state locked to the second rail 1b (the state shown in FIG. 1). Conversely, it is also possible to return the locked state from the second rail 1b to the first rail 1a. Note that, when the lock unit 2 is unlocked, the seat base 6 can also be moved in the front-to-rear direction by sliding the swivel part 6a along the first rail 1a.

[0029] As shown in FIGS. 7 to 11, the locking device 3 includes a locking section 4 and a turntable 5. As shown in FIGS.

[0030] The locking portion 4 has a rail direction restricting portion 41 and a vertical direction restricting portion 42. The rail direction restricting portion 41 is provided on the underside of the turntable 5 and has a base 4a, an engaging protrusion 4b, a first recess 4c, and a second recess 4d. The engaging protrusion 4b is a protrusion extruded from the base 4a in a shape corresponding to two adjacent fitting holes 1d among the multiple fitting holes 1d in the rails 1a and 1b. The first recess 4c and the second recess 4d are parts of the surface of the base 4a that are not extruded.

[0031] The vertical direction restricting part 42 is attached to the turntable 5 so as to be slidable in the vertical direction and rotatable, and has a shaft 4x that passes through the turntable 5 in the vertical direction, an operating part 4p provided at one end of the shaft 4x, and a locking piece 4r provided at the other end of the shaft 4x. A spring 4u is also provided between the vertical direction restricting part 42 and the turntable 5, with the lower end of the spring 4u abutting against the bottom surface of the turntable 5 and the upper end abutting against the operating part 4p. The vertical direction restricting part 42 is urged upward by the spring 4u, bringing the locking piece 4r closer to the turntable 5.

[0032] Therefore, when the operating portion 4p is pressed down, the spring 4u is compressed, causing the vertical direction restricting portion 42 to slide downward relative to the turntable 5. When the operating portion 4p is released, the vertical direction restricting portion 42 slides upward relative to the turntable 5 due to the elastic force of the spring 4u (see FIGS. 10 and 11). When the vertical direction restricting portion 42 is rotated while being pressed down, the lock piece 4r can be housed in both the first recess 4c and the second recess 4d. The elastic force of the spring 4u is greater than the elastic force of the spring 1, which will be described later. The effect of this will be described later.

[0033] The turntable 5 corrects the positional deviation between the locking part 4 and the second rail 1b when the seat base part 6 is turned around the first vertical axis 6c to a position where the locking part 4 and the second rail 1b can be locked.

[0034] The turntable 5 is attached to the turntable support part 9 so that it can rotate and not come off in the vertical direction. Specifically, the turntable 5 has flanges 5a that protrude radially from both ends of a cylinder. Two protrusions 5c are provided on the flanges 5a. The protrusions 5c restrict the range of movement of the turntable 5. The protrusions 5c allow confirmation that the orientation of the lock part 4 has been positioned. In other words, no matter which direction the turntable 5 is rotated in, the protrusions 5c will come into contact with the stopper 9c of the bracket 7. At that time, the orientation of the rail direction restricting part 41 is either along the rails 1a, 1b or perpendicular to them.

[0035] In this way, the turntable 5 is designed to rotate only within a range of 90 degrees. Specifically, by rotating the turntable 5 by 90 degrees, the rail direction regulating unit 41 can be transitioned between the state shown in FIG. 8 and the state shown in FIG. 9. Note that 5b is the rotation axis (second vertical axis 5b) of the turntable 5. The second vertical axis 5b is located away from the center 4y (third vertical axis) of the shaft 4x.

[0036] The turntable 5 is also provided with a plunger 5d and a restricting pin 5e. The plunger 5d confirms that the locking piece 4r has been positioned relative to the base 4a. When the plunger 5d enters the hole 4t and a clicking sensation is felt, it can be confirmed that the locking piece 4r (the vertical direction restricting portion 42) has rotated 90 degrees. Even if the plunger 5d comes out of the hole 4t, the restricting pin 5e abuts against the abutting portion 4s of the operating portion 4p, restricting further rotation of the vertical direction restricting portion 42.

[0037] The bracket 7 has a slide portion 8 and a turntable support portion 9. The slide portion 8 has a slide mechanism that allows the locking device 3 to slide up and down along the leg portion 6b. The slide portion 8 also has a position holding mechanism that returns the locking device 3 to its initial position away from the floor 30.

[0038] Specifically, the slide portion 8 has a guide hole 8a through which a pin provided on the leg portion 6b is passed, and a rail 8b attached to a rail provided on the leg portion 6b. The slide portion 8 slides up and down along the leg portion 6b by the guide hole 8a and the rail 8b.

[0039] The slide portion 8 also has a spring 8c and a pin 8d for hooking one end of the spring 8c. The other end of the spring 8c is hooked to a predetermined position on the leg portion 6b. The bracket 7 (lock portion 4) is always biased upward by the spring 8c, and when the lock device 3 is unlocked, it slides and attempts to return to its initial position. The elastic force of the spring 8c is smaller than that of the spring 4u. The effect of this will be described later.

[0040] The turntable support part 9 rotatably supports the turntable 5. Specifically, it has a circular hole into which the turntable 5 fits. A resin bearing 9b is interposed to ensure smooth rotation of the turntable 5. The turntable support part 9 also has a stopper 9c against which a protrusion 5c of the turntable 5 comes into contact.

[0041] According to the lock unit 2 described above, the turntable 5 rotates around the second vertical axis 5b, which is spaced apart from the first vertical axis 6c, as shown in Fig. 6. Furthermore, by attaching the lock part 4 at a position eccentric to the second vertical axis 5b, the orientation of the lock part 4 relative to the seat base 6 and the distance from the first vertical axis 6c can be adjusted as the turntable 5 rotates.

[0042] (Mechanism of Locking System 10) 12 to 18, we will explain the movement of the main parts when the seat base 6 goes from a state locked to the first rail 1a to a state locked to the second rail 1b after turning 90 degrees. Focusing on the locking device 3 locked to the first rail 1a on the left side of FIG. 6, FIGS. 12 to 14 show only the main parts for explaining the mechanism. Also, FIGS. 15 to 18 show a cross-sectional view of the locking device 3 in the upper row (A) and a plan view of the main parts in the lower row (B).

[0043] As shown in Fig. 12, the locking device 3 locks the leg portion 6b to the first rail 1a. Specifically, as shown in Fig. 15, the engagement protrusion 4b fits into the engagement hole 1d. This restricts movement of the seat base portion 6 in the rail length direction. In this way, the first rail 1a and the second rail 1b have a rail structure in which the engagement protrusion 4b of the locking portion 4 fits from above the rail in a direction extending in the rail length direction.

[0044] Additionally, the locking piece 4r clamps the narrow portion 1c together with the base 4a. Thus, the first rail 1a and the second rail 1b have the same rail structure, in which the locking piece 4r, which is rotatable around the shaft 4x (third vertical axis) inside the rail, is hooked and locked. This restricts the upward movement of the leg 6b. The seat base 6 is now locked to the first rail 1a.

[0045] To release the lock, first rotate the lock piece 4r (vertical direction restricting portion 42) located on the back side of the narrow portion 1c by 90 degrees to position it on the back side of the first recess 4c, as shown in Figures 15 and 16. Immediately after attempting to rotate it, the plunger 5d will come out of the hole 4t, so you can hear a click.

[0046] 17, the elastic force of the spring 4u is used to store the lock piece 4r in the first recess 4c. Thereafter, the lock piece 4r and the narrow portion 1c no longer interfere with each other, and the spring 8c causes the locking device 3 to slide upward together with the bracket 7, and the engaging protrusion 4b comes out of the fitting hole 1d. The seat base 6 is now unlocked from the first rail 1a.

[0047] Next, we will explain the process from when the seat base 6 is rotated 90 degrees to when it is locked to the second rail 1b. When the seat base 6 is rotated 90 degrees around the first vertical axis 6c, the locking device 3 is positioned above the second rail 1b, as shown in Figure 13. Here, the orientation and position of the engaging protrusion 4b do not match the fitting hole 1d of the second rail 1b.

[0048] Therefore, the operating part 4p is used to rotate the turntable 5, correcting the orientation and position of the engaging protrusion 4b. The spring 8c causes the turntable 5 to always move upward together with the bracket 7. When rotating the turntable 5, in order to maintain the vertical position of the turntable 5, it is necessary to hold the operating part 4p and resist the elastic force of the spring 8c.

[0049] If the spring 4u were to compress, the lock piece 4r would move away from the first recess 4c, but as mentioned above, the elastic force of the spring 4c is smaller than that of the spring 4u. Therefore, even if the operating part 4p is held, the spring 4u will not compress, and the lock piece 4r will remain housed in the first recess 4c.

[0050] When the turntable 5 is rotated 90 degrees, the engaging protrusion 4b is positioned directly above the fitting hole 1d of the second rail 1b, as shown in Figures 14 and 18. In other words, the turntable 5 adjusts the orientation of the engaging protrusion 4b relative to the seat base portion 6 and the distance from the first vertical axis 6c.

[0051] As described above, the spacing between adjacent fitting holes 1d in first rail 1a is the same as the spacing between adjacent fitting holes 1d in second rail 1b. That is, as shown in Fig. 12, the spacing h1 between fitting holes 1d in first rail 1a is the same as the spacing h2 between fitting holes 1d in second rail 1b.

[0052] Therefore, even if the seat base portion 6 before rotation is slid back and forth and the locking position of the locking portion 4 relative to the first rail 1a is different (for example, even if it was locked one frame earlier), when the turntable 5 is rotated after rotation, it will always be positioned directly above the corresponding fitting hole 1d of the second rail 1b.

[0053] Thereafter, by following the above-described steps in reverse, the seat base 6 is locked to the second rail 1b. That is, as shown in Figure 17, the locking device 3 is slid downward together with the bracket 7 against the force of the spring 8c. This causes the engaging protrusion 4b to fit into the fitting hole 1d, restricting movement of the seat base 6 in the rail direction.

[0054] Then, as shown in Fig. 16, the lock piece 4r (vertical direction restricting portion 42) is pushed downward against the force of the spring 4u, and the lock piece 4r, which has left the first recess, is rotated 90 degrees as shown in Fig. 15. At the timing of the 90-degree rotation, the plunger 5d enters the hole 4t, and a clicking sensation can be confirmed.

[0055] As a result, the locking piece 4r clamps the narrow portion 1c together with the base 4a, restricting the upward movement of the leg 6b. The seat base 6 is now locked to the second rail 1b.

[0056] To summarize the above, the lock system 10 according to this embodiment has the following configuration: Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

[0057] That is, the locking system (10) is a locking system for locking a seat base (6) to a floor (30). The locking system includes a first rail (1a) extending along the floor (30), a locking unit (4) provided on the seat base (6) so as to be lockable with the first rail (1a) and capable of adjusting the position of the seat base (6) on the floor (30) in the rail length direction by selecting a locking position relative to the first rail (1a), a swivel unit (6a) that swivels the seat base (6) about a first vertical axis (6c) relative to the floor (30) when the locking unit (4) is in an unlocked state, a second rail (1b) extending along the floor (30) away from the first rail (1a), and a locking position adjustment unit that corrects any misalignment between the locking unit (4) and the second rail (1b) when the seat base (6) is swiveled about the first vertical axis (6c) to a lockable position.

[0058] According to the above configuration, the seat base (6) can slide and rotate along the first rail (1a). The locking unit (4) used to lock the seat to the first rail (1a) is also used to lock the seat to the second rail (1b), and any misalignment of the locking unit (4) relative to the second rail (1b) is corrected by the lock position adjusting unit. This allows the seat base (6) to be fixed in place by changing its position and orientation relative to the floor (30) with a simpler configuration.

[0059] In addition, the lock position adjustment unit has a turntable (5) that rotates around a second vertical axis (5b) that is spaced apart from the first vertical axis (6c), and the lock unit (4) is attached to the turntable (5) at a position eccentric to the second vertical axis (5b), thereby adjusting the orientation of the lock unit (4) relative to the seat base (6) and the distance from the first vertical axis (6c) as the turntable (5) rotates.

[0060] According to the above configuration, the orientation and distance of the locking portion (4) are adjusted simultaneously, so the mechanism of the lock position adjusting portion can be made simpler than, for example, a case in which only the orientation of the locking portion (4) is first adjusted using the turntable (5) and then the turntable (5) is slid to adjust the distance.

[0061] In addition, the first rail (1a) and the second rail (1b) have the same rail structure in which the locking portion (4) is fitted from above the rail in a direction extending in the rail length direction and the locking piece rotated around the third vertical axis inside the rail is caught and locked, and the lock position adjustment portion adjusts the orientation of the locking portion (4) relative to the seat base portion (6) and the distance from the first vertical axis (6c).

[0062] According to the above configuration, the locking portion (4) can be locked directly to the second rail (1b) without providing a striker that protrudes from above the floor (30) on the second rail (1b).

[0063] The first rail (1a) and the second rail (1b) extend parallel to each other, and the locking portions (4) can be locked at regular intervals along the rail length.

[0064] According to the above configuration, regardless of the locking position of the locking portion (4) on the first rail (1a), the locking portion (4) can be locked to the second rail (1b) by rotating about the first vertical axis (6c).

[0065] Other Embodiments Although one embodiment of the present invention has been described above, the present invention can be embodied in various forms other than the above embodiment.

[0066] 1. In the above embodiment, the seat base (seat) is taken as an example of an object to be locked to the floor, but it may also be, for example, a cabinet, a bookshelf, a system kitchen, or the like.

[0067] 2. In the above embodiment, the number of locking units attached to the leg portion is two, but it may be one or three or more. For example, if there are three locking units, there will be three first rails and one second rail.

[0068] 3. In the above embodiment, the locking unit is attached to a position eccentric to the rotation center (second vertical axis) of the turntable, and the orientation and distance of the locking unit are adjusted at the same time. However, the orientation may be adjusted by rotating the locking unit, and then the distance may be adjusted by sliding it. In other words, the locking unit may be attached to the rotation center of the turntable, and a lock position adjustment unit may be provided that slides the turntable itself.

[0069] 4. In the above embodiment, the seat base is locked by rotating it 90 degrees, but it may be locked by rotating it at any angle, such as 45 degrees. In this case, if the first and second rails are to be kept parallel to each other, it may be necessary to reduce the gap between the first and second rails or adjust the rotation angle of the turntable and the eccentric position of the locking unit. Note that only one of the two locking units is locked to the second rail.

[0070] 5. The second rail does not have to be parallel to the first rail, but may extend so as to intersect the first rail. The seat may be locked by rotating it 90 degrees relative to the second rail. In this case, adjustment of the turntable rotation angle and the eccentric position of the locking part is required.

[0071] The seat may also be rotated to the angle formed by each rail relative to the intersecting second rail. For example, if the angle is 60 degrees, the seat may be rotated by 60 degrees and locked. In this case, there is no need to rotate the turntable (to adjust the direction of the locking part). In other words, all that is required is a lock position adjustment part that slides the locking part to adjust the distance.

[0072] 6. The locking parts that lock onto each rail are not limited to engagement protrusions or locking pieces, but may be any that correspond to the structure of the rail. For example, the locking parts may be protrusions that snap into the rail's mating holes. Furthermore, the locking parts may be hooks that fit into strikers that protrude from the rail.

[0073] 7. The fitting holes of each rail do not need to be spaced equally apart, and may be arranged in any manner as long as the locking position can be selectively adjusted relative to the first rail. [Explanation of symbols]

[0074] 1a First rail 1b 2nd rail 1c narrow part 1d mating hole 2 lock unit 3 Locking device 4 Locking section 41 Rail direction control part 4a Pedestal 4b Engagement protrusion 4c First recess 4d Second recess 42 Vertical direction regulation part 4p operation section 4s Contact part 4r Lock piece 4t hole 4u spring 4x shafts 4y center 5. Turntable 5a flange 5b Second vertical axis 5c protrusion 5d plunger 5e Regulatory Pin 6 Seat base 6a Swivel section 6b Legs 6c First vertical axis 6d engaging protrusion 6e Retaining part 6f Sliding part 6h Mounting stand 7 Bracket 8 Slide section 8a Guide hole 8b rail 8d pin 9 Turntable support 9b Resin bearing 9c Stopper 10 Locking System 20 sheets 30 floors

Claims

1. A locking system for locking an object to a floor, comprising: a first rail extending along the floor; a locking unit that is provided on the object so as to be lockable with the first rail, and that can adjust the position of the object on the floor in the rail length direction by selecting a locking position with respect to the first rail; a swivel unit that swivels the object about a first vertical axis relative to the floor when the lock unit is in an unlocked state; a second rail extending along the floor away from the first rail; a lock position adjustment unit that corrects a positional deviation between the lock unit and the second rail when the object is rotated around the first vertical axis to a lockable position.

2. 2. The locking system of claim 1, The lock position adjustment unit has a turntable that rotates around a second vertical axis that is spaced apart from the first vertical axis, and the lock unit is attached to the turntable at a position eccentric to the second vertical axis, thereby adjusting the orientation of the lock unit relative to the object and its distance from the first vertical axis as the turntable rotates.

3. 3. The locking system according to claim 1 or 2, the first rail and the second rail have the same rail structure in which the locking portion is fitted from above the rail in a direction extending in the rail length direction and a locking piece rotated around a third vertical axis inside the rail is hooked and locked, A lock system in which the lock position adjustment unit adjusts the orientation of the lock unit relative to the object and the distance from the first vertical axis.

4. 4. The locking system of claim 3, A locking system in which the first rail and the second rail extend parallel to each other and the locking portions can be locked at equal, regular intervals along the rail length.

Images