DE202009018483U1 - Person receiving device and kinematic chain - Google Patents

Abstract

Person pick-up device (100) for picking up and transporting a person from outside to a location lying inside a vehicle body (114, 116), the person pick-up device (100) forming a kinematic chain (122; 230), which has at least one degree of translation freedom (FXY, FZ , FX2) and a first degree of freedom of rotation (FA), characterized in that the kinematic chain (122; 230) has at least one further degree of freedom of rotation (FB).

Description

The present invention relates to a person receiving device and a kinematic chain. In particular, the invention relates to a personal pick-up device and a kinematic chain for receiving and transporting a person to a location within a vehicle body using a kinematic chain having at least one translational degree of freedom and a first rotational degree of freedom.

The DE 693 01 509 T2 discloses a seat apparatus with a movable seat on which a worker can sit during assembly of parts in a car body. The car body is being conveyed in an assembly line. Above the assembly line, a pair of guide rails are attached to a ceiling. On the guide rails two links are arranged, which allows movement in two horizontal mutually perpendicular directions. Under the second member, a lifting member is provided, which can be moved by a pneumatic cylinder in the vertical direction. Below the lifting member, a hanger arm extends along a substantially semicircular arc. At a lower end portion of the hanger arm, a seat member is attached, which allows a worker to sit on it. The seat member is rotatable about a vertical axis and height adjustable. The seat enters through a lateral opening of the car body in the interior of the same.

The utility model DE 20 2005 020 066 U1 discloses a seat device with an approximately C-shaped bracket having at one upper portion a suspension device for a ceiling suspension and at a lower portion a seat for a person. The C-shaped bracket has a vertical guide column on which a horizontal support arm is arranged vertically adjustable and lockable. On the support arm, the seat is also arranged horizontally displaceable. The suspension device comprises an arrangement of two movable rail guide, which are perpendicular to each other, and a hinge for rotatably supporting the bracket thereto.

The object of the present invention is to provide an improved personal pick-up device and a kinematic chain for picking up a person and conveying the person to a location within a vehicle body.

According to the invention, this object is achieved by the subject matter of the independent claims. Variants and preferred embodiments of the invention will become apparent from the claims, the following description and the drawings.

The personal pick-up device for receiving and transporting a person from outside to a location within a vehicle body forms a kinematic chain having at least one translational degree of freedom and a first rotational degree of freedom, wherein the kinematic chain has at least one further rotational degree of freedom.

A kinematic chain in the present context is a system of rigid bodies connected by joints. The joints can have different degrees of freedom. A kinematic chain can consist of at least three members or bodies, which are connected to each other via joints. To the limbs can count a fixed frame.

In the case of joints, the degree of freedom generally describes the number and types of possible movements that the joint can perform. Thereby, six possible freedom of movement of the body can be available in three-dimensional space. Within a joint, a maximum of five freedoms can be realized.

The person-receiving device according to the invention can achieve a high degree of mobility by virtue of its further rotational freedom of movement. It can be used variably and flexibly, offers more comfort for a worker and can enter differently shaped openings.

According to a development of the invention, the kinematic chain has at least six degrees of freedom. In particular, the six degrees of freedom include four translational degrees of freedom, three of which are orthogonal, and two orthogonal rotational degrees of freedom.

The translational degrees of freedom are orthogonal if their axes of motion or traversing directions are perpendicular to each other, d. H. include a 90 ° angle. The rotational degrees of freedom are orthogonal if their axes of rotation are perpendicular to each other, d. H. include a 90 ° angle.

Translational and rotational degrees of freedom can also be parallel, and that is when their movement axes or traversing directions are parallel to one another. Rotation degrees of freedom are parallel when their axes of rotation are parallel. The personal reception device may include three orthogonal translation degrees of freedom and a fourth translational degree of freedom parallel to one of the three orthogonal ones.

The person receiving device may not include parallel rotational degrees of freedom.

There may also be three translational degrees of freedom, three rotational degrees of freedom, or more translational and rotational degrees of freedom. Preferably, "coarse" degrees of freedom for long travel or rotation and "fine" degrees of freedom for small travel and rotation of the kinematic chain can be provided.

According to a development of the invention, a seat coupled to a first rotary joint forms the end of an open kinematic chain, wherein the first rotary joint has the at least one further rotational degree of freedom.

The seat is a device designed to accommodate a person. The seat can be formed in several parts or in one piece and comprise a seat surface and a backrest. Furthermore, the seat z. B. armrests, a headrest, a safety belt, footrests or the like. The seat is preferably designed so that the person sitting on it upright and / or sit back and / or lie to the side and / or lying on his stomach and / or lie supine and / or can stand.

An advantage of such a seat is the greater comfort for the person being picked up on the seat and transported to a location within a vehicle body. The person can thus be easily transported from outside to the place by narrow and / or low openings of the vehicle body. The inventive recording of the person on the seat allows the person assembly and / or inspection work or the like z. B. to do within a narrow vehicle body or the like, without having to take an unnatural or uncomfortable attitude, for example.

In addition to the first rotary joint, at least one further joint may be provided which has the first rotational degree of freedom and / or further degrees of freedom, in particular translational degrees of freedom. The first rotational degree of freedom and the further rotational degree of freedom can be designed orthogonal.

• 1) geschlossene kinematische Ketten, bei denen die Glieder und Gelenke eine geschlossen Ringartige Struktur bilden,
• 2) offene kinematische Ketten, bei denen ein Glied am anderen über je ein Gelenk verbunden bzw. gekoppelt ist, wobei die kinematisch Kette an einem Ende ein feststehendes Gestell aufweist und am anderen Ende frei beweglich ist,
• 3) offen verzweigte kinematische Ketten, bei denen einerseits eine geschlossene kinematische Kette vorliegt und an einem Gelenk eine weitere offene kinematische Kette gekoppelt ist, und
• 4) geschlossen verzweigte kinematische Ketten, bei denen mehrere geschlossene kinematische Ketten miteinander gekoppelt vorliegen.

There are also different types of kinematic chains in the present context:

• 1) closed kinematic chains, in which the links and joints form a closed ring-like structure,
• 2) open kinematic chains in which one link is connected or coupled via a respective joint, wherein the kinematic chain has a fixed frame at one end and is freely movable at the other end,
• 3) open branched kinematic chains, in which on the one hand there is a closed kinematic chain and at a joint another open kinematic chain is coupled, and
• 4) closed branched kinematic chains in which several closed kinematic chains are coupled together.

As an alternative to the open kinematic chain, the person receiving device can also form a closed, an open-branched or a closed-branch kinematic chain.

An advantage of open kinematic chains lies in the simple, space-saving and favorable implementation with few links and joints compared to closed kinematic chains.

An advantage of closed kinematic chains, such as hexapods or the like, lies in their higher load capacity and higher positioning accuracy compared to open kinematic chains.

Open branched kinematic chains can combine advantages of open and closed kinematic chains.

According to a development of the invention, the first rotary joint is coupled to a linear system, wherein the linear system has the at least one translational degree of freedom.

The kinematic chain can have four translational degrees of freedom, three of which are orthogonal. The fourth translational degree of freedom may be parallel to one of the three orthogonal and implemented by the linear system.

The linear system comprises z. B. a scissor mechanism, a telescopic mechanism, such. As a hydraulic or pneumatic cylinder, a rail system, or the like.

According to a development of the invention, the linear system is coupled to a boom which has the at least one translational degree of freedom.

The linear system and the boom can each have at least one translational degree of freedom, which are orthogonal to each other. As a result, a flexible and variable personal reception device can be implemented with little articulation.

According to a development of the invention, the boom is arranged on a carriage via a second rotary joint, wherein the second rotary joint has the first rotational degree of freedom.

The second rotary joint may have multiple degrees of rotation and / or translational freedom. As a result, more joints can be saved.

According to a development of the invention, the carriage is articulated so coupled with a fixed guide that he has the at least one translational degree of freedom.

The fixed guide may generally form a fixed frame of a kinematic chain to which the carriage is hinged.

Is no further link between the fixed guide and the end of the kinematic chain, d. H. the seat, coupled with the kinematic chain so as to form a closed structure, the fixed guide, the carriage, the second rotary joint, the boom, the linear system, the first rotary joint and the seat form an open kinematic chain having the aforementioned advantages can bring with it.

At least one further link coupled to the kinematic chain and / or at least one further joint can form a closed, open-branched or closed branched kinematic chain, which brings about the aforementioned advantages.

According to a development of the invention, the seat comprises a sensor.

The sensor may include active or passive sensors and is generally a resistive, inductive, capacitive, piezoelectric, optoelectronic, electrochemical or temperature dependent sensor or the like. The sensor may be located in or on the seat, backrest, armrests, headrest, seatbelt, footrests, or elsewhere. Through an interaction, in particular a movement, of the person recorded on the seat with the sensor, an active or passive movement of one of the joints and / or limbs, such. As the first or second rotary joint, the boom, the linear system, the car or the like, are controlled.

Active movement of the joints and / or members may be caused by an electric motor, hydraulics, pneumatics or the like. Passive movement of the joints and / or limbs may be caused, for example, by the person.

An advantage of such a sensor is greater comfort for the person seated on the seat. For example, it can intuitively control movement of the kinematic chain by a small movement, posture or weight shift on the seat.

According to a development of the invention, the linear system is designed as a scissors mechanism.

A scissor mechanism is an example of lifts known forth "accordion-like" in one direction extendable structure of intersecting and hinged together scissor elements.

According to a further development of the invention, a lock is provided for attaching the person receiving device to a conveyed vehicle body, so that both are movable together.

Vehicle bodies can be transported in conveyor systems, for example between different assembly points. In order to facilitate the work within a straight transported vehicle body with the person receiving device, a lock may be provided, which temporarily connects the person receiving device with the transported vehicle body so that as is carried synchronously. The lock prevents the vehicle body from temporarily changing the relative distance to the person receiving device.

A kinematic chain according to the invention has a free end and a fixed guide, between which a two-axis joint movable in two horizontal directions, a first pivot rotatable about a vertical axis in a direction of rotation, a telescopic link moveable in the vertical direction, one in one of the two horizontal Directions movable linear joint and a rotatable about a horizontal axis second rotary joint four translational degrees of freedom and two rotational degrees of freedom of the kinematic chain, wherein a seat forms the free end and is designed to accommodate a person and to transport to a lying within a vehicle body location.

With the device according to the invention, a person is picked up and moved with a person holding device forming a kinematic chain to a location within a vehicle body in which the kinematic chain is moved in at least one translational degree of freedom and a first rotational degree of freedom, the kinematic chain moving in a further rotational degree of freedom becomes.

According to a development of the invention, a seat at one end of kinematic chain in a first horizontal traversing direction between two arranged in a production line one behind the other vehicle bodies positioned so that the seat offset in parallel and disposed between the rear of the first vehicle body and the front of the second vehicle body behind it.

Subsequently, the seat is moved in the apparatus according to the invention in a direction perpendicular to the first horizontal travel direction second horizontal travel direction between the first and the second vehicle body.

Thereafter, the person is taken on a seat of the person receiving device and the seat rotated by the further rotational degree of freedom. Thereafter, the person receiving device is moved in a vertical direction of travel.

Subsequently, the person activates a sensor in the seat, which controls the movement of the person receiving device in a further rotational degree of freedom, and the person is conveyed by a rear opening of the vehicle body to a location within the vehicle body.

The person-receiving device according to the invention or the kinematic chain according to the invention is used in a vehicle body conveyed by a conveyor belt.

Hereinafter, further embodiments of the invention will be explained in more detail with reference to schematic drawings. Showing:

1A - 1C a plan view of a person receiving device according to the invention

1D a side view of a person receiving device according to the invention

2 a schematic view of a kinematic chain according to the invention

3A - 3D schematic views of inventive kinematic chains

4 a perspective view of a seat device of the prior art

1A shows a person receiving device 100 with: a seat 102 , one at the seat 102 arranged scissors mechanism 104 in retreat position, one on the scissor mechanism 104 arranged boom 106 , one on the boom 106 arranged car 108 , a first pair of rails 110 and a second pair of rails 112 , The two rail pairs 110 . 112 are above a first one 114 and second car body 116 (Number exemplified) arranged.

The arrow 118 indicates an orientation direction in three-dimensional space and will be referred to as X-direction in the following. The arrow 120 indicates another orientation direction orthogonal to the X direction in three-dimensional space, and will be referred to as Y direction hereinafter.

The car 108 is along the first pair of rails 110 movable in Y-direction. The first pair of rails 110 is again along the second pair of rails 112 movable in X-direction. The second pair of rails 112 is fixed and defines a fixed frame of a kinematic chain 122 , The boom 106 is movable in a direction orthogonal to the X and Y directions (hereinafter referred to as Z direction) by a hydraulic cylinder or the like. In addition, the boom 106 about a running in the Z direction axis of rotation rotatably on the car 108 stored.

At a car 108 opposite end of the boom 106 is the scissor mechanism 104 extendable arranged. At the extendable end of the scissors mechanism 104 is the seat 102 in an in 1 arranged starting position shown. This defines the person receiving device 100 the kinematic chain 122 starting from the fixed second pair of rails up to its movable end, which is the seat 102 forms.

In the starting position is the seat 102 laterally from the first car body 114 arranged offset and a backrest 124 of the seat 102 points to the left side of the first car body 114 , This starting position occurs when car bodies in series under the fixed second pair of rails 112 be promoted in the X direction.

From the starting position out becomes the first pair of rails 110 along the X-direction so, ie the person receiving device 100 moves in the X direction that the seat 102 between the rear of the first car body 114 and the front of the second car body 116 comes to a stop. The dashed lines 126 indicate a target area into which the person receiving device 100 the seat 102 to proceed in a first step. A fitter can now on the seat 102 take a seat.

1B shows the seat 102 that compared to 1A rotated 90 ° and in the target area 126 procedure is. The seat 102 is still side to the car bodies 114 . 116 added. The backrest 124 points in the in 1B shown arrangement to the rear of the first car body 114 ,

1C shows that compared to 1B seat moved in the Y-direction 102 , The backrest 124 also points to the rear of the first car body 114 , but now lies approximately in the middle of the stern and opposite a rear opening 128 , The one on the seat 102 sitting mechanic is in 1A to 1C Not shown.

1D shows a side view of in 1A - 1C illustrated arrangement. In this side view is a headrest 130 and a rotation axis 132 of the seat visible. Also, in 1D the scissor mechanism 104 (already slightly extended) with the scissor elements 134 and the bottom edge 136 the person receiving device 100 shown.

The scissor mechanism 104 should be in an in 1D shown step in the X direction in the rear opening 128 the first car body 114 method. This is made possible by the fact that the seat 102 including scissors mechanism 104 initially from the hydraulic cylinder in the boom 106 is raised in the Z direction, so that the lower edge 136 the person receiving device 100 in the Z direction is higher than a lower edge of the rear opening 128 , Subsequently, the leans in 1D not shown mechanic so against the headrest 130 of the seat 102 in that a pressure sensor (in 1D not shown) detects that pivoting of the seat about the axis of rotation 132 is required. The effective height extension of the seat 102 with the fitters sitting on it is reduced by a rearward pivoting of the seat so that the seat 102 by means of the scissors mechanism 104 in the X direction through the rear opening 128 can proceed without edges on the rear opening 128 to come across.

In the same way, the seat 102 move into other opening of car bodies. The rearward pivoting of the seat makes it possible to seat 102 also to move in an opening whose height is less than the height of a non-swiveled seat 102 ,

The scissor mechanism that can be moved in the X direction 104 make sure the boom 106 not to the vehicle body 114 but at the same time the seat abuts 102 can be transported from outside to a location inside the car body.

2 shows a fixed frame 200 , A 2-axis joint 202 is movable on the fixed frame in the Y and X directions 200 arranged. The 2-axis joint thus has two translational degrees of freedom F _XY compared to the fixed frame 200 ,

A vertical intermediate link 204 is below the 2-axis joint 202 arranged and coupled with this. Below the intermediate link 204 is a first pivot 206 arranged and with the intermediate member 204 coupled. The first swivel 206 has a Z-directional axis of rotation and a first rotational degree of freedom F _A. Below the first pivot 206 is a hydraulic cylinder 208 arranged and with the swivel joint 206 coupled. The hydraulic cylinder 208 is extendable in the Z direction and thus has a third translational freedom F _Z. Below the hydraulic cylinder 208 is a scissor mechanism 210 arranged and with one from the hydraulic cylinder 208 extendable hydraulic piston 212 coupled. The scissor mechanism 210 extends laterally from the hydraulic piston 212 and is extendable in the X direction, ie it has a fourth translational freedom F _X2 . A seat base plate 214 is laterally next to the scissors mechanism 210 arranged and with their extendable end 216 coupled. The seat base plate 214 is about a second pivot 218 with a seat 220 coupled. The second hinge 218 has a rotational axis extending in the Y direction and a second rotational degree of freedom F _B. The seat 220 includes as partial elements: a headrest 222 , a backrest 224 , a seat 226 and a footrest 228 , The axis of rotation of the second pivot 218 is orthogonal to the axis of rotation of the first pivot 206 , In the 2 shown arrangement forms an open kinematic chain 230 with the limbs and joints: fixed frame 200 , 2-axis joint 202 , Intermediate link 204 , first swivel 206 , Hydraulic cylinder 208 and hydraulic pistons 212 , Scissor mechanism 210 , Seat base plate 214 , second pivot 218 and seat 220 ,

One on the seat 220 recorded person is through the in 2 shown kinematic chain 230 in the four translational degrees of freedom F _XY , F _Z , F _X2 and the two rotational degrees of freedom F _A , F _B conveyed.

In addition, sub-elements of the seat 220 be mobile to each other. Pans the seat 220 from an upright position to an inclined position, the sub-elements move so as to form a nearly flat couch. In general, the sub-elements can be so mobile that in any inclination of the seat 220 an ergonomic seat or lying surface for those on the seat 220 recorded person emerges.

3A to 3D show embodiments of kinematic chains having a different number of joints, joint degrees of freedom and limbs.

For the calculation of degrees of freedom of 3A to 3D shown kinematic chains, the equation (1) from DUBBEL, paperback for mechanical engineering, Springer Verlag, 22nd edition, p. G155 used:

F stands for the number of degrees of freedom of the calculated kinematic chain. The parameter b stands for the degree of movement of transmissions, with b = 6 for generally spatial transmissions. The variable n stands for the number of links in the kinematic chain, one of which is a fixed frame. The parameter i is a running index. The variable g stands for the number of joints of the kinematic chain. The variable f _i stands for the number of joint degrees of freedom of the i-th joint in the kinematic chain.

3A shows a kinematic chain with a fixed frame 300 as the first link, a first joint 302 having three degrees of freedom of transmittance and one rotational degree of freedom, a second term 304 , a second joint 306 having a translational degree of freedom and a rotational degree of freedom, and a seat 308 as the third member. Using equation (1) one obtains F _3A = 6 · (3 - 1) - [(6 - 4) + (6 - 2)] = 12 - [2 + 4] = 6 degrees of freedom

3B shows a kinematic chain with: a fixed frame 310 as the first link, a first joint 312 , which has three translational degrees of freedom, a second term 314 , a second joint 316 having a translational degree of freedom and a rotational degree of freedom, a third term 318 , a third joint 320 , which has a rotational degree of freedom, and a seat 322 as fourth member. Using equation (1) one obtains: F _3B = 6 · (4 - 1) - [(6 - 3) + (6 - 2) + (6 - 1)] = 18 - [3 + 4 + 5] = 6 degrees of freedom

3C shows a kinematic chain with: a fixed frame 320 as the first link, a first joint 324 having two translational degrees of freedom and one rotational degree of freedom, a second term 326 , a second joint 328 that has a translational degree of freedom, a third term 330 , a third joint 320 that has a translational degree of freedom, a fourth term 334 , a fourth joint 336 , which has a rotational degree of freedom, and a seat 338 as the fifth member. Using equation (1) one obtains: F _3C = 6 · (5 - 1) - [(6 - 3) + (6 - 1) + (6 - 1) + (6 - 1)] = 24 - [3 + 5 + 5 + 5] = 6 degrees of freedom

3D shows a kinematic chain with: a fixed frame 340 as the first link, a first joint 342 that has a translational degree of freedom, a second term 344 , a second joint 346 having a translational degree of freedom, a third term 348 , a third joint 350 having a rotational degree of freedom, a fourth term 352 , a fourth joint 352 that has a translational degree of freedom, a fifth term 354 , a fifth joint 356 that has a translational degree of freedom, a sixth term 358 , a sixth joint 360 which has a rotational degree of freedom, and a seat 362 as the seventh member. Using equation (1) one obtains: F _3D = 6 · (7 - 1) - [6 · (6 - 1)] = 36 - 30 = 6 degrees of freedom

It will be apparent to those skilled in the art that many combinations of links and hinges are possible as embodiments of the subject invention. In addition to the in 3A - 3D Combinations shown are also possible in which further joints and members provide more than six degrees of freedom, or in which just as many joints and members are provided that at least one translational degree of freedom and a first and another rotational degrees of freedom arise.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 69301509 T2 [0002]
• DE 202005020066 U1 [0003]

Cited non-patent literature

• DUBBEL, Paperback for Mechanical Engineering, Springer Verlag, 22nd Edition, p. G155 [0073]

Claims (11)

Person receiving device ( 100 ) for receiving and transporting a person from outside to inside a vehicle body ( 114 . 116 ), wherein the person receiving device ( 100 ) a kinematic chain ( 122 ; 230 ) having at least one degree of translational freedom (F _XY , F _Z , F _X2 ) and a first rotational degree of freedom (F _A ), characterized in that the kinematic chain ( 122 ; 230 ) has at least one further rotational degree of freedom (F _B ). Person receiving device ( 100 ) according to claim 1, in which the kinematic chain ( 122 ; 230 ) has at least six degrees of freedom (F _XY , F _Z , F _X2 , F _A , F _B ), in particular four translational degrees of freedom (F _XY , F _Z , F _X2 ), of which three (F _XY , F _Z ) are orthogonal, and two orthogonal rotational degrees of freedom (F _A , F _B ). Person receiving device ( 100 ) according to claim 1, in which one with a first rotary joint ( 218 ; 306 . 320 . 336 . 360 ) coupled seat ( 102 ; 220 ; 308 . 322 . 338 . 362 ) the end of an open kinematic chain ( 122 . 230 ), wherein the first rotary joint ( 218 ) has the at least one further rotational degree of freedom (F _B ). Person receiving device ( 100 ) according to claim 3, wherein the first rotary joint ( 218 ; 306 . 320 . 336 . 360 ) with a linear system ( 104 ; 210 ), the linear system ( 104 ; 210 ) has the at least one translational degree of freedom (F _X2 ). Person-taking device ( 100 ) according to claim 4, in which the linear system ( 104 ; 210 ) with a boom ( 106 ; 208 ; 314 . 330 . 354 ), which has the at least one degree of translational freedom (F _Z ). Person receiving device ( 100 ) according to claim 5, wherein the boom ( 106 ; 208 ; 314 . 330 . 354 ) via a second rotary joint ( 206 ; 350 ) on a car ( 108 ), wherein the second rotary joint ( 206 ; 350 ) has the first rotational degree of freedom (F _A ). Person receiving device ( 100 ) according to claim 6, wherein the carriage ( 108 ) so articulated with a fixed guide ( 122 ; 200 ; 300 . 310 . 322 . 340 ) is coupled to have the at least one degree of translational freedom (F _XY ). Person receiving device ( 100 ) according to one of claims 3 to 7, in which the seat ( 102 ; 220 ; 308 . 322 . 338 . 362 ) comprises a sensor. Person receiving device ( 100 ) according to claim 4, in which the linear system ( 104 ; 210 ) as a scissors mechanism ( 104 ; 210 ) is trained. Person receiving device ( 100 ) according to one of the preceding claims, in which a catch for suspending the person receiving device ( 100 ) to a conveyed vehicle body ( 214 ) is provided so that both are movable together. Kinematic chain ( 122 ; 230 ) with: - a free end and - a fixed leadership ( 122 ; 200 ; 300 . 310 . 322 . 340 ), between which - a 2-axis joint that can be moved in two horizontal directions ( 108 ; 202 ), - in a rotational direction about a vertical axis rotatable first rotary joint ( 206 ; 348 ), - a vertically movable telescopic joint ( 106 ; 208 ), - in one of the two horizontal directions movable linear joint ( 104 ; 210 ) and - a second rotary joint rotatable about a horizontal axis ( 218 ; 306 . 320 . 336 . 360 ) four translational degrees of freedom (F _XY , F _Z , F _X2 ) and two rotational degrees of freedom (FA, F _B ) of the kinematic chain ( 122 ; 230 ), one seat ( 102 ; 220 ; 308 . 322 . 338 . 362 ) forms the free end and is designed to accommodate a person and to a person within a vehicle body ( 114 ).

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