JP5122166B2 - lift device - Google Patents

Description

  The present invention relates to an elevating device that is mounted on a vehicle and gets on and off a wheelchair, a carriage, or other cargo.

  Conventionally, as this type of lifting device, a device shown in the following Patent Document 1 proposed by the present applicant is known. This conventional apparatus has a structure in which a platform is attached to a lower end portion of a side frame that is lifted and lowered by a parallel link mechanism. By rotating the parallel link, the platform is placed at a landing position and a vehicle body floor such as a van type car. It can be moved up and down between the substantially coincident rising positions.

Japanese Utility Model Publication No. 63-44272

  By the way, when the above-mentioned conventional device is used for getting on and off a wheelchair, the user of the wheelchair is on the platform outside the vehicle in a state where the platform is substantially flush with the floor of the vehicle body such as a van type car or a one-box car. It is indispensable to move the wheelchair from the vehicle body floor to the vehicle floor or vice versa, and there are some steps or gaps between the platform outside the vehicle and the vehicle floor, so smooth movement of the wheelchair is possible. There was a risk of hindrance. In addition, since it is necessary to operate the wheelchair on the platform in the raised position on the outside of the vehicle, there is a tendency to give anxiety to the wheelchair user.

  On the other hand, a configuration is also conceivable in which the platform is retracted inside the body of a van-type vehicle, a one-box vehicle, or the like. In this case, when the platform is moved to the inside of the vehicle body, if a person's foot or the like comes in contact with the platform being pulled in as an obstacle, there is a risk of causing an injury accident.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an elevating device that improves safety by avoiding the danger associated with the operation of pulling the platform into the vehicle body.

  Other objects and novel features of the present invention will be clarified in embodiments described later.

In order to achieve the above object, a lifting device according to an aspect of the present invention includes a lifting platform,
A platform holder for holding the lifting platform movably in the front-rear direction;
A stay arm with the platform holder attached to the lower end;
A body frame fixed to the body floor,
First and second arms forming a substantially parallel link having one end pivotally attached to the body frame and the other end pivotally attached to the stay arm;
A cylinder for rotating the first or second arm to drive the lifting platform;
A front vehicle stop plate connected to the front edge of the elevating platform so as to be raised and lowered;
A rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered;
A tape sensor that is attached in a band shape to the rear edge that is the side to be pulled into the vehicle body of the elevating platform, and that conducts when pressed ,
An electric motor that drives the lifting platform back and forth with respect to the platform holder in a state where the platform holder is pulled up on the vehicle body floor surface;
The rear vehicle stop plate is in a state of being depressed by the pulling operation of the lifting platform into the vehicle body, and when the tape sensor detects an obstacle during the pulling operation and becomes conductive, the motor is defined by a timer. It is characterized by reverse rotation for a predetermined period .

  According to the lifting device of the present invention, the tape sensor that is conductive when pressed is attached to the rear edge of the lifting platform that is pulled into the vehicle body in a belt shape, so that the lifting platform is pulled into the vehicle body. When the tape sensor hits an obstacle such as a person's foot, the presence of the obstacle can be reliably detected.

  In addition, when the motor is configured to automatically reverse for a predetermined period in conjunction with the tape sensor conduction (that is, fault detection), the lifting platform can be quickly separated from the obstacle, and an accident can be prevented. Can be prevented.

  Hereinafter, as the best mode for carrying out the present invention, an embodiment of a lifting device will be described with reference to the drawings.

  FIG. 1 and FIG. 2 show an embodiment of the present invention, which shows the overall configuration of the lifting device, and FIG. 3 is a tape that conducts when pressed to the trailing edge of the lifting platform on the drawing side into the vehicle body. FIG. 4 shows the operation when the tape sensor detects an obstacle, FIG. 5 shows the mechanism part that drives the lifting platform back and forth, and FIG. 6 shows the lifting platform by the platform holder. 7 and FIG. 8 show the front side car stop device, FIG. 9 and FIG. 10 show the rear side car stop device, and FIG. 11 shows the lock mechanism for retracting and holding the lifting platform in the limit position. Reference numeral 12 denotes a configuration of a control circuit for reversing the electric motor when the tape sensor detects an obstacle.

  1 and 2, reference numeral 1 denotes a van-type vehicle (box-type vehicle), and a main body frame 2 is erected and fixed on a rear floor surface 1a near the rear surface opening of the vehicle body of the van-type vehicle. Yes. A main arm 3 and a sub arm 4 that constitute a substantially parallel link are pivotally attached (rotatably mounted) to the main body frame 2. That is, one end of the main arm 3 is pivotally attached to the main body frame 2 by the pin 3a, and one end of the sub arm 4 is pivotally attached by the pin 4a. A stay arm 5 is pivotally attached to the other end of the main arm 3 and the sub arm 4 by pins 3b and 4b, and a platform holder 10 is fixed to the lower end of the stay arm 5. Further, a double-acting hydraulic cylinder 20 for driving up and down is connected between the pins 4a and 3b. Therefore, when the double-acting hydraulic cylinder 20 is contracted, the platform holder 10 is in the raised position in FIG. 1, and when the double-acting hydraulic cylinder 20 is extended, the platform holder 10 is in the lowered position in FIG.

  On the platform holder 10, an elevating platform 30 is slidably (slidable) in the front-rear direction. The platform holder 10 is configured to support both side surfaces of the lifting platform 30 and includes side members 10a (shown also in FIG. 5) on both the left and right sides and a connecting portion 10b that connects lower portions of the left and right side members 10a. As shown in FIGS. 2, 5, and 6, the side member 10 a is pivotally supported (rotatably supported) by a plurality of rollers 11 facing both side surfaces of the elevating platform 30, and engages with these rollers 11. The substantially U-shaped rail 31 having a cross section constitutes side portions on both sides of the platform 30.

  Further, the front-rear drive of the platform 30 is performed by winding a toothed belt (timing belt) 32 having both ends fixed to the front and rear of the platform 30 around a drive belt wheel 13 that is rotationally driven by the electric motor 12, as shown in FIG. Do. The electric motor 12 is fixed to the platform holder 10, and driven belt wheels 14, 15 are pivotally supported by the platform holder 10 before and after the driving belt wheel 13.

  As shown in FIG. 1 (a) and FIG. 6 showing the state in which the lifting platform 30 is retracted to the retracted limit position (the most retracted position), as shown in FIG. A roller 35 is pivotally attached. The traveling roller 35 travels on a retracting rail 36 (integrated with the main body frame 2) fixed on the floor surface 1a when the platform 30 is retracted into the passenger compartment of the van type vehicle 1. The platform 30 can be smoothly retracted and retracted.

  In addition, a tape sensor 130 is attached to the rear edge of the lifting platform 30 on the side where it is drawn into the vehicle body via an attachment member 120 having a certain width, as shown in FIGS. ing. The mounting member 120 is fixed in a bowl shape so as to protrude with a constant width W to the rear edge except for both ends where the traveling rollers 35 of the elevating platform 30 are disposed, and the tape sensor 130 is mounted on a substantially vertical surface of the mounting member 120. It is attached (fixed) in a strip shape over the entire length in the longitudinal direction. The tape sensor 130 is provided for detecting an obstacle when the platform is pulled in. For example, the tape sensor 130 has a structure in which a pressure conductive rubber is sandwiched between flat knitted wires of a conductor, and conducts when pressed (several Ω or less). It is possible to use a product that is commercially available under the trade name “Code Switch” (manufactured by Bridgestone).

  As shown in FIGS. 7 and 8, the front side car stop device 40 includes a front car stop plate 41, which is connected to the front edge of the elevating platform 30 (here, the right side in FIG. 1 is the front side of the platform) so as to be raised and lowered. A spring 42 that constantly urges the plate 41 in the standing direction and an operation link mechanism 70 are provided. That is, the front car stop plate 41 is connected to the front edge of the platform 30 by a hinge 45 having a pin 44, and the spring 42 is a hoop spring or the like. The lower end of the platform 30 and the lower surface of the front car stop plate 41 are connected to each other. It is arranged between joints. The spring 42 is provided to reduce the standing operation force of the front-side vehicle stop plate 41.

  The operation link mechanism 70 moves from the lock position (= the position where the front vehicle stop plate 41 is raised to the state shown in FIG. 7A) to the lock release position (= the position where the front vehicle stop plate 41 is turned down as shown in FIG. 7B). The operation lever 71 is pivotally attached to one side of the front end of the platform 30 so as to be freely swingable, and the small link 72 is connected to the operation lever 71 and the distal end portion of the front wheel stopper plate 41. An operation lever 71 is rotatably attached to a bracket 46 fixed to the upper surface of the platform 30 by a pin 73 serving as a rotation fulcrum. End cylindrical members 74 and 75 are attached to both ends of the operation lever 71 so that the stepping operation is easy, and the operation lever 71 abuts against cushioning members (cushion rubber) 76 and 77 fixed on the platform side. The swing range of 71 is restricted.

  In the locked position of FIG. 7 (A), the operation lever 71 is connected to the operation lever 71 rather than a straight line connecting the pivot center C1 of the operation lever 71 and the pivot center C2 of the small link 72 to the end portion of the front side stop plate 41. Even if an external force is applied in the direction in which the front wheel stopper plate 41 is lowered, the pivoting center C3 of the small link 72 is positioned downward, and the force is applied to the operation lever 71 in the direction to keep the locked position, and the state does not change. .

  When the operation lever 71 is swung from the locked position to the unlocked position shown in FIG. 7B by stepping or the like, the front vehicle stop plate 41 can freely rotate from the standing state to the depressed state, and the front vehicle stop plate 41 is free from its own weight. The tip can be landed. Further, by stepping on the end cylindrical member 74 attached to the end of the operation lever 71, the operation lever 71 can be rotated to the right, and the front vehicle stop plate 41 can be returned to the standing state as shown in FIG. . Since the front side car stopper plate 41 is biased in the standing direction by the elastic force of the spring 42 (the elastic force is not strong enough to forcibly stand up), the operation lever 71 is rotated to the right to move the front car stopper plate 41. The operating force for returning to the standing state can be reduced. When the operation lever 71 returns to the lock position and the front vehicle stop plate 41 stands up, the lock is automatically applied.

  3, 9, and 10, the rear car stop device 80 includes a rear car stop plate 50 that is connected to the rear end of the side member 10 a of the platform holder 10 by a pin 51 so as to be raised and lowered, and the rear car stop plate 50 in an upright direction. Springs 52 (hoop springs, etc.) that are urged toward the rear, an operation roller 81 pivotally attached to the bottom surface of the rear end of the lifting platform 30 via a bracket 34 (coaxial with the traveling roller 35), and a rear vehicle stop plate 50 An operation surface 52 that is in contact with the operation roller 81 and a flange portion 53 that faces the end portion of the operation surface 52. The operated surface 52 has an inclined surface 52 a that becomes higher toward the tip of the rear vehicle stopper plate 50. The spring 52 is arranged between the platform holder 10 and the engaging portion of the rear surface of the rear vehicle stop plate 50 and has an elastic force that can force the rear vehicle stop plate 50 to stand up.

  When the lifting platform 30 is in a forward limit position (a state in which the platform holder 10 can be lifted and lowered at the most advanced position) with respect to the platform holder 10 in the rear side car stopper device 80, FIG. 9 (C) and FIG. As described above, the platform-side operation roller 81 enters between the flange 53 on the rear vehicle stop plate side and the operated surface 52 to hold (lock) the rear vehicle stop plate 50 in an upright state. For this reason, even if an external force is applied in a direction that causes the rear vehicle stop plate 50 to bend down, the operation roller 81 is positioned below the flange portion 53, so that the rear vehicle stop plate 50 can be kept standing.

  The advance limit position of the lifting platform 30 with respect to the platform holder 10 is such that the stopper 90 attached to the rear end of the platform 30 abuts on the roller 11 on the platform holder 10 side (the left end position) as shown in FIG. It is prescribed. The pull-in limit position of the elevating platform 30 may be detected by attaching a limit switch to the vehicle body floor side, or may be defined by providing a mechanical stopper.

  When the lifting / lowering platform 30 is retracted at the ascending limit position where the platform holder 10 is pulled up on the vehicle body floor surface 1a, the platform 30 in FIG. 9 moves to the left. As a result of moving to the left, the operation roller 81 moves on the inclined surface 52a as shown in (d) and (e) from the locked state in FIG. 9 (c), and the operated surface 52 is pushed down by the operation roller 81. The rear-side vehicle stop plate 50 is in a state of being obstructed so that the platform 30 can be retracted.

  3 and 11 show that when the platform holder 10 is in the ascending limit position on the vehicle body floor surface 1a and the elevating platform 30 is in the retracting limit position with respect to the platform holder 10, the lifting platform 30 is in the retracting limit position. 1 shows a locking mechanism 100 for locking. The lock mechanism 100 includes a shaft body 101 that penetrates the pull-in rail 36, a hook 102 (lock member) that engages with a bracket 34 on the bottom surface of the rear end of the platform 30, an arm 103, and an unlock hydraulic cylinder 104. And have. A hook 102 is fixed to one end of the shaft body 101, an arm 103 is fixed to the other end of the shaft body 101, and the arm 103 is attached in a direction to contact the unlocking hydraulic cylinder 104 by a coil spring 105 provided on the shaft body 101. It is energized. The cylinder 104 is fixed to a mounting plate 110 fixed to the pull-in rail 36 side.

  When the lifting platform 30 is moved in the retracting direction with respect to the platform holder 10, the hook 102 can be rotated counterclockwise as shown in FIG. 11, so that it can move to the retracting limit position. By engaging with the engaging portion 34a of 34, the advancement of the elevating platform 30 can be prevented and locked.

  The lock mechanism 100 can be unlocked by pushing the arm 103 in the solid line state in FIG. 11 with the rod 104a of the unlock hydraulic cylinder 104 and rotating it to the left (virtual line position). 30 can be advanced.

  FIG. 12 shows the electric motor 12 driving the platform 30 when the tape sensor 130 attached to the rear edge of the lifting platform 30 on the pulling side into the vehicle body is pushed by the obstacle and becomes conductive. It is an example of a control circuit that performs reverse rotation control for a period (a very short time of about several seconds). A supply voltage from a battery (for example, DC12V) of the van type car 1 is applied to a series circuit of the tape sensor 130 and the relay RY, and the voltage is supplied to the electric motor 12 via the contacts SW1 and SW2 of the relay RY. It is like that.

  As shown in FIG. 4B, when the platform 30 is retracted, there is no obstacle and the tape sensor 130 is not conducting. In normal operation, the motor 12 continues to retract the platform 30 and retracts the platform 30. Store to the limit position. At this time, when there is an additional floor surface 1b that is raised relative to the original rear floor surface 1a so that no step is generated with respect to the upper surface of the platform 30, the additional floor surface 1b and the upper surface of the platform 30 are substantially the same. As a result, the work of a wheelchair, a carriage, etc. becomes smoother.

  However, when there is an additional floor surface 1b that is raised relative to the rear floor surface 1a, when the platform 30 is in the advanced state, a portion in which the platform 30 is stored becomes a recess, and an obstacle 140 such as a human foot is present here. It is dangerous to move the platform 30 backward while keeping it. To prevent this danger, the tape sensor 130 described above is provided. As shown in FIG. 4A, when the tape sensor 130 is pushed by the obstacle 140 and becomes conductive, the relay RY in FIG. 12 is excited. Thus, the contacts SW1 and SW2 are switched, the polarity of the supply voltage to the motor 12 is reversed, and the motor 12 is reversed (drives the platform 30 in the forward direction). The reversal period is defined by the timer TM to about several seconds. That is, the timer TM is turned on and operates the electric motor 12 only for a predetermined period determined from when the contacts SW1 and SW2 are switched. By the rapid reverse operation of the electric motor 12, the platform 30 is immediately separated from the obstacle 140, and even if the obstacle 140 is a human foot or the like, the occurrence of injury can be prevented and safety can be ensured.

  The rear vehicle stop plate 50 is attached to the platform holder 10 and does not move with the platform 30, so that it does not hinder the obstacle detection of the tape sensor 130.

  Next, the overall operation of this embodiment will be described.

  As shown in FIG. 1, when the double-acting hydraulic cylinder 20 for raising and lowering drive is in a contracted state, the platform holder 10 is in the raised position where it is drawn into the passenger compartment of the van-type vehicle 1, and the platform 30 is further moved to FIG. ), The platform 30 can also be retracted into the passenger compartment. The retracting operation of the platform 30 is performed by rotating the driving belt wheel 13 counterclockwise by the electric motor 12 of FIG. 5 and causing the toothed belt 32 to travel leftward.

  Further, when the platform 30 is retracted, when it hits an obstacle 140 such as a human foot, it is detected by the tape sensor 130 and the motor 12 is reversed for a short time to avoid danger.

  After the platform 30 is retracted to the retract limit position, the platform 30 is locked by the lock mechanism 100.

  On the contrary, when the lock mechanism 100 is unlocked, the operation drive belt wheel 13 is rotated to the right to move the platform 30 at the retract limit position in FIG. Position). In the forward position of FIG. 1 (b), the front vehicle stop plate 41 connected to the front edge of the platform 30 is set to the locked state (the state of FIG. 7 (A)). Further, since the rear vehicle stopper plate 50 connected to the rear edge of the platform holder 10 is forcibly provided with a driving force in the standing direction by the spring 52, the operation roller 81 shown in FIGS. When the operation roller 81 enters between the flange 53 on the rear vehicle stop plate side and the operated surface 52, the operation roller 81 is automatically locked.

  When the hydraulic cylinder 20 is extended from the advanced state of the platform 30 shown in FIG. 1 (b), the main arm 3 and the sub arm 4 constituting the substantially parallel link are rotated, and the platform holder 10 is landed as shown in FIG. To do. That is, the platform 30 descends while maintaining a substantially horizontal level. It is desirable to set two links composed of the main arm 3 and the sub arm 4 so that the tip side of the platform 30 is slightly lowered when landing.

  In FIG. 2, when the wheelchair 60 is put on the platform 30, the operation lever 71 of the vehicle stop device 40 of the lifting platform is swung to the unlocking position (left rotation operation) in FIG. In this state, the wheelchair 60 is moved to the platform 30. Thereafter, by swinging the control lever 71 to the locked position shown in FIG. 7A (right-turning operation), the front vehicle stop plate 41 is raised and the control lever 71 is set to the locked position shown in FIG. It returns and locks automatically. Therefore, even if the front vehicle stop plate 41 is pushed by the wheelchair 60, the front vehicle stop plate 41 maintains the standing state. In addition, since the platform 30 is in the forward limit position with respect to the platform holder 10, the rear vehicle stop plate 50 is also locked in the standing state of FIG.

  Then, the hydraulic cylinder 20 is contracted to rotate the main arm 3 and the sub-arm 4 to raise the platform holder 10 and the platform 30, so that the ascending limit position in FIG. The wheelchair 60 can be moved to the retract limit position of the platform 30. At the time of the retraction operation, as described with reference to FIG. 9, the rear vehicle stop plate 50 attached to the rear end of the platform holder 10 is automatically unlocked, and the rear vehicle stop plate 50 is in a face down state. Can be smoothly pulled in. Further, the platform 30 is locked by the lock mechanism 100 at the retract limit position.

  As shown in FIG. 4A, when the platform 30 is retracted, when it hits an obstacle 140 such as a human foot, it is detected by the tape sensor 130 and the motor 12 is reversed for a short time to avoid danger.

  According to this embodiment, the following effects can be obtained.

(1) The lifting device of the present embodiment can be pulled into the vehicle body as well as raising and lowering the lifting platform 30 to improve the operability of the user such as a wheelchair and a cart, and the smooth use of the wheelchair and the cart Can be realized. In addition, when the platform 30 is pulled into the vehicle body, when it hits an obstacle 140 such as a human foot, the motor 12 can be reversed for a short time by detecting it with the tape sensor 130 on the rear end side of the platform 30. To avoid. As a result, safety can be improved.

(2) The rear car stop device 80 allows the rear car stop plate 50 to be automatically locked in the upright state when the elevating platform 30 is in the forward limit position with respect to the platform holder 10, so that the operability is good and safe. The nature is also high.

(3) The platform 30 can be pulled in and locked to the limit position by the lock mechanism 100, and rattling during vehicle travel can be prevented.

(4) The front side car stop device 40 operates the front side car stop plate 41 connected to the front edge of the platform 30 so as to be raised and lowered by the operation link mechanism 70, but the operation link mechanism 70 itself has a lock function. There is no need to provide a separate locking means, the structure is simplified, and the operability is good. That is, the lock position of the operation lever 71 is also a position where the front vehicle stop plate 41 is erected. At this lock position, the small link 72 is pivotally attached to the pivot center C1 of the operation lever 71 and the end portion of the front vehicle stop plate 41. The pivot center C3 of the small link 72 to the operation lever 71 is located below the straight line connecting the center C2, and the operation lever 71 is locked even if an external force is applied in the direction in which the front vehicle stopper plate 41 is bent. The force of the direction to keep the state is added, and the state does not change. In other words, the front vehicle stop plate 41 can be locked in the standing state.

(5) When the operating lever 71 is swung from the locked position to the unlocked position in order to place the front side car stopper plate 41 in a state of being lowered, the relationship between the C1, C2 and C3 is broken, and the front car stopper plate 41 is in an upright state. It is possible to turn to the state where it is lying down. Further, by swinging the operating lever 71 in the reverse direction, the front vehicle stop plate 41 returns to the standing state, and the operating lever 71 also returns to the lock position and is automatically locked. Therefore, there is no need to forget to lock, and safety can be improved.

  Although the embodiments of the present invention have been described above, it will be obvious to those skilled in the art that the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the claims.

It is a whole structure of embodiment of the raising / lowering apparatus which concerns on this invention, Comprising: It is a side view when an raising / lowering platform exists in a raise limit position. Similarly, it is a side view when the platform holder is in a landing state. It is a top view which shows arrangement | positioning of the tape sensor with respect to an raising / lowering platform, the attachment structure of a rear side vehicle stop plate, and a locking mechanism. It is explanatory drawing of the drawing-in operation | movement to the vehicle body inside a raising / lowering platform. It is a side view which shows the mechanism part which drives a raising / lowering platform to the front-back direction. It is a partial expanded sectional view which shows the structure part which supports a raising / lowering platform movably in the front-back direction with a platform holder. It is an enlarged side view which mainly shows the front side vehicle stop apparatus of a raising / lowering platform. It is also an enlarged plan view. It is an enlarged side view which mainly shows a rear side vehicle stop apparatus. It is a perspective view which shows the side part structure of a rear side vehicle stop plate. It is an enlarged side view of a lock mechanism. It is a circuit diagram which shows the control circuit for reversing an electric motor, when a tape sensor detects an obstruction at the time of drawing-in operation of a raising / lowering platform.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Van type vehicle 1a Floor surface 1b Additional floor surface 2 Main body frame 3 Main arm 4 Sub arm 5 Stay arm 10 Platform holder 11, 35 Roller 12 Electric motor 13 Drive belt wheel 20 Drive hydraulic cylinder 30 Lifting platform 31 Cross section substantially U-shaped rail 32 Toothed belt 36 Pull-in rail 40 Car stop device for elevating platform 41 Front car stop plate 42, 52 Spring 45 Hinge 50 Rear car stop plate 53 Operated surface 54 Buttocks 60 Wheelchair 70 Operation link mechanism 71 Operation lever 72 Small link 76, 77 Buffer member 80 Rear side car stop device 81 Operation roller 100 Lock mechanism 120 Mounting member 130 Tape sensor 140 Obstacle RY Relay SW1, SW2 Contact TM Timer

Claims (1)

A lifting platform;
A platform holder for holding the lifting platform movably in the front-rear direction;
A stay arm with the platform holder attached to the lower end;
A body frame fixed to the body floor,
First and second arms forming a substantially parallel link having one end pivotally attached to the body frame and the other end pivotally attached to the stay arm;
A cylinder for rotating the first or second arm to drive the lifting platform;
A front vehicle stop plate connected to the front edge of the elevating platform so as to be raised and lowered;
A rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered;
A tape sensor that is attached in a band shape to the rear edge that is the side to be pulled into the vehicle body of the elevating platform, and that conducts when pressed ,
An electric motor that drives the lifting platform back and forth with respect to the platform holder in a state where the platform holder is pulled up on the vehicle body floor surface;
The rear vehicle stop plate is in a state of being depressed by the pulling operation of the lifting platform into the vehicle body, and when the tape sensor detects an obstacle during the pulling operation and becomes conductive, the motor is defined by a timer. An elevating device that reverses for a predetermined period .

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