JP2008307088A - Low floor type stretcher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low floor type stretcher which is useful as an operating table, a treatment table, or the like for accurately and conveniently seeing a target diseased site of an emergency patient fluoroscopically and photographing the target diseased site by a C-shaped arm type surgical X-ray image diagnostic apparatus. <P>SOLUTION: The low floor type stretcher is equipped with a pair of front and rear electrically-operated linear actuators (A) pivotally attached to a trolley (S), a lift mechanism (U) which makes bending movements by using the linear actuators (A) as a driving source, and an elevating and lowering rack (R) of patient supporting decks (FD), (RD) which make elevating and lowering movements by the lift mechanism (U). A right and left mutual interval (W2) of bearing posts (3) for wheels which are adjunct to the trolley (S) is narrower than a certain width (W3) of the elevating and lowering rack (R) to assure the low ground height (h1) without making the elevating and lowering rack (R) interfere with the trolley (S) when the elevating and lowering rack (R) is lowered. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is not only used for transporting emergency patients in hospitals, but also as an operating table, treatment table, treatment table, etc. in a fixed state. Retcher related.

  The present applicant previously proposed Japanese Patent Application Laid-Open No. 2006-288705 entitled “Stretcher capable of collecting X-ray images”. This is considered to be the publicly known technique that most closely approximates the present invention.

According to this known invention, X-ray imaging is performed within a frame of a patient support deck (FD) (RD) assembled and integrated as a flat base from a pair of upper and lower border frames (57) (58) (65) (66). Because the holder (H) of the film cassette (M) is slidably stored and installed via the slide tray (T) therefor, the patient is placed on the patient support deck (FD) (RD) in the horizontal bed state. There is an advantage that the target affected part of the patient and the target affected part of the patient who is drowned using the rear support deck (RD) as the backrest can be X-rayed by loading and using the X-ray film cassette (M).
JP 2006-288705 A

  However, as a result of extensively collecting opinions from doctors, nurses, and other hospital staff who handle emergency patients and intensive studies, the configuration of the known invention still has the following problems.

  That is, in the case of the above-described known invention, as is apparent from the paragraphs [0035] and [0053] and FIGS. 2 and 5 of the specification, the width of the carriage (S) integrated into a substantially rectangular frame in plan view. The dimension and the width dimension of the lifting rack (R) integrated into a substantially rectangular frame in plan view are set to about 600 mm which is the same as each other.

  The width dimension of about 600 mm illustrated in the bag is a numerical value that takes into account the size of the human body, but if it is wider than this, a hospital elevator that requires one doctor and two nurses to board It is difficult to quickly and smoothly put the stretcher in and out of hospitals and hospital rooms.

  Moreover, in the known invention, the lower end of the lower lift arm (43) that forms the lift mechanism (U) of the lifting rack (R) at the front and rear ends of the carriage (S) supported by a total of four casters (C). Are pivotally connected via a horizontally extending rotation shaft (45), and the rotation shaft (45) and the upper surface of the carriage (S) have substantially the same ground height.

  Therefore, as is clear from the explanatory diagram of FIG. 56, when the lifting rack (R) of the patient support deck (FD) (RD) is lowered to the minimum level, the lifting rack (R) is not attached to the carriage (S). The upper surface of the patient support deck (FD) (RD) is still high because of the stacked state received on the upper surface.

  This does not change even in the configuration of the third embodiment shown in FIGS.

  As a result, the task of carrying an emergency patient to the patient support deck (FD) (RD) and transferring the patient from the support deck (FD) (RD) to an existing bed in the hospital becomes a heavy labor. In the unlikely event that a patient falls from the support deck (FD) (RD), there is a risk of serious injury.

  Second, the idler roller (51) pivotally supported by the upper lift arm (42) on the front side (patient's foot side) of the above-described known invention is the inner surface of both side frames (39) in the lifting rack (R). Since the lower lift arm (43) is adjacent to the inner position of the upper lift arm (42), the lift mechanism ( The left and right mutual gap (x) of U) becomes narrow.

  In that case, since the horizontal rotation shaft (45) laid horizontally on the lower end of the lift mechanism (U) is at substantially the same ground height as the upper surface of the carriage (S) as described above, the maximum limit is reached. The vertical gap (y) between the lift rack (R) that has been lifted and the carriage (S) is also narrowed accordingly.

  As a result, inserting and using the C-shaped arm (136) of the X-ray diagnostic imaging apparatus (E) in the internal space (Z) of the stretcher is still difficult and smooth, and the emergency performance is inevitably lowered. It is.

  The present invention aims to further improve such problems, and in order to achieve the object, in claim 1, a cart supported by a total of four casters, and an intermediate portion of the cart are stretched downward. An electric linear actuator pivotally attached as a pair of symmetrical front and rear to the control unit support frame, a control unit for controlling the linear actuator installed inside the support frame, and the linear actuator as a drive source. A lifting mechanism, a lifting rack that is lifted and lowered by the lifting mechanism, and a pair of front and rear patient support decks installed in parallel on the lifting rack,

  Operate the above control unit with a hand-held remote controller to keep the patient support deck not only in a horizontal bed state at the desired installation height, but also in a head-up state or a head-down state at the desired tilt angle. In a stretcher that can

  From the pair of left and right side frames and a pair of front and rear cross frames welded in a stacked state to the upper surfaces of both ends, the cart is framed in a long and narrow planar shape in the front and rear direction, and extends to the lateral end of the cross frame. While each of the caster bearing posts is welded in a vertical state in which the distance between the left and right sides is smaller than a certain width of the lifting rack,

  A total of four upper lift arms, each of which is a pair of front and rear lift mechanisms of the lifting rack, and a total of four lower lifts that are pivotally coupled to the lower end of the lift rack via separate horizontal fulcrum shafts. Shape from the arm,

  A pair of horizontal front and rear mounting bosses welded horizontally to the lower end of the lower lift arm, and projecting from the upper half of the caster bearing post, which is taller than the side frame of the carriage, in opposite longitudinal directions Each pivotally pivoted to the tip of the mechanism support frame,

  While pivotally connecting the intermediate part of the mounting boss and the output advance / retreat rod of the linear actuator,

  Of the upper lift arms forming the lift mechanism, the idler roller pivotally supported on the upper end of the front upper lift arm is engaged with the slide guide rail welded to the lower surface of the side frame in the lifting rack so as to be able to move forward and backward. On the other hand, the upper end of the remaining rear upper lift arm is assembled and fixed to the side frame of the lifting rack,

  The lift mechanism is set so that the lifting rack can be lowered to substantially the same installation height as the cross frame of the carriage without interfering with the carriage.

  According to the second aspect of the present invention, a separate reinforcing plate is welded to the upper end of the upper lift arm in a horizontal state extending in the front-rear direction while maintaining a constant crossing angle in a side view with the upper lift arm itself. And

  From the reinforcing plate of the front upper lift arm, a plurality of horizontal roller support shafts are integrally extended laterally to support a free-moving roller that can be moved forward and backward, and engages with the slide guide rail.

  The reinforcement plate of the remaining rear upper lift arm is assembled and integrated into the side frame of the lifting rack with a plurality of fixing bolts,

  From the middle part of the horizontal mounting boss welded horizontally to the lower end of the lower lift arm, a link piece for pivotally connecting to the output advance / retreat rod of the electric linear actuator is seen from the side of the lower lift arm itself. As a state of maintaining a constant and invariant crossing angle in the above, it is characterized by projecting integrally in the opposite longitudinal direction.

  Further, in claim 3, while the front support deck is fixedly integrated with the upper surface of the lifting rack, the rear support deck can be reclined with respect to the front support deck by a predetermined inclination angle by the back and forth operation of the pneumatic cylinder. It is characterized by being pivotally connected.

  According to the above-described configuration of the first aspect, the lifting rack is lowered by setting the horizontal spacing of the caster bearing posts and the length of the horizontal mounting boss in the lift mechanism to be smaller than a certain width of the lifting rack. Since the relationship is set so as not to interfere with the carriage, the stretcher of the present invention is provided with a low floor type, as is apparent from comparison between FIG. 56 showing the known invention at the beginning and the corresponding FIG. 30 of the present invention. As a result, it is possible to carry out various tasks such as carrying emergency patients to the patient support deck of the lifting rack that has been lowered to its minimum level and transferring them to existing hospital beds. The problems of the known invention described in the above are solved.

  Further, since the side frame forming the carriage is depressed by a certain height difference from the cross frame and the horizontal mounting boss horizontally mounted on the lower end portion of the lift mechanism, the side frame is also lowered as shown in FIGS. As is clear from the above, in the state where the lifting rack is raised to the maximum limit, the vertical gap between the lifting rack and the carriage becomes wider than that of the first known invention.

  Moreover, since the idler roller pivotally supported by the upper lift arm that forms the lift mechanism is engaged with the slide guide rail welded to the lower surface of the side frame in the lifting rack, The left and right clearances of the lift mechanism are also wider than the first known invention.

  As a result, the C-arm of the X-ray diagnostic imaging device can be inserted more easily and smoothly into the expanded internal space when the lifting rack is in the lifted state, either from the front-rear direction or the left-right direction. It can be used, and there is an effect that an accurate X-ray fluoroscopic image and X-ray image of the target affected part in the emergency patient can be obtained.

  In that case, if the structure of claim 2 is adopted, the load-bearing capacity of the lift mechanism can be remarkably increased, for example, about 250 kg, and the lift arm is kept constant, especially when the lifting rack is lifted by the electric linear actuator. In a stable state with the crossing angle maintained, the robot does not swing in the front-rear direction, does not meander, and moves so as to go straight up and down, so there is no possibility of giving the patient a sense of discomfort or anxiety.

  Furthermore, if the structure of Claim 3 is employ | adopted, an emergency patient can be kept in a reclining state by using the back support deck of a patient support deck as a backrest, and the exact X-ray fluoroscopic image and X-ray of the target affected part can be maintained. It is useful for collecting captured images and is also extremely convenient.

  Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 7 show the entire low floor type stretcher according to the basic embodiment, which is a cart with a braking mechanism (B). (S), and a lift rack (R) that is supported so as to be movable up and down via a lift mechanism (U) that refracts on the carriage (S), and a reclining mounted on the lift rack (R). It consists of a pair of possible front and back patient support decks (FD) (RD).

  Among such main components, first, the carriage (S) is placed in a horizontal state in which it is stacked on a pair of parallel left and right side frames (1) maintaining a constant distance (d1) (for example, about 150 mm) and the upper surfaces of both ends thereof. Each pair of front and rear cross frames (2) welded to each other has a frame plane shape extending in the front-rear direction as shown in FIGS. 8 to 10, and has a constant ground height by casters (C) described later. (H1) Supported in a horizontally installed state (for example, about 255 mm).

  Both cross frames (2) of the carriage (S) are made of square steel pipes having a fixed length (W1) (for example, about 454 mm), and a total of four casters are provided at the protruding lateral ends of both cross frames (2). The bearing posts (3) are each welded vertically. (W2) is the distance between the left and right of the bearing post (3), for example, about 490 mm, which is narrower than the width of the lifting rack (R) described later so as not to interfere with the lifting rack (R) that moves up and down. Relationship is set.

  Moreover, each bearing post (3) is made of a round steel pipe with a top cover, and a short support frame (4) for the lift mechanism projects integrally from the upper half in the opposite longitudinal direction. Has been. In addition, a lift mechanism fulcrum bearing pipe (5) is also fitted and integrated in a laterally horizontal state orthogonal to the bearing post (3) at the projecting tip of each support frame (4). . (H2) shows a constant height difference between the upper surface of the side frame (1) and the center of the lift mechanism fulcrum bearing tube (5) in the carriage (S). The side frame (1) is in a depressed state.

  Both side frames (1) of the carriage (S) are also made of square steel pipes of a certain length (L1) (for example, about 1096 mm), and a total of four braking operation pedals that are symmetrical from the inner side surface near both front and rear ends Each of the bearing stays (6) is integrally projected downward.

  In addition, a pair of front and rear control unit support frames (7) facing each other as U-shaped as shown in FIG. The front and rear portions of the bottoms of both support frames (7) are in a state of being fixed by partitioning via a horizontal receiving floor (8).

  Further, a pair of front and rear linear actuator bearing stays (9) are integrally projected from opposite bottom portions of both support frames (7) in opposite directions. In that case, the bearing stay (9) is either left or right of the longitudinal center line as compared with the receiving floor (8) of the support frame (7) extending along the longitudinal center line of the carriage (S). Eccentric to one side.

  Note that (10) shows a total of four corner reinforcing plates that are symmetrical to each other. Each of the side frames (1) and the cross frame (2) of the carriage (S) crosses at a right angle to each corner. Welded.

  The caster bearing post (3) is in an installed state in which the stem (11) of the caster (C) is inserted and suspended from below. In addition, a total of four casters (C) is a three-way system that can simultaneously perform braking (rotation stop), straight travel and 360-degree free swivel (Swivel) by the attached braking mechanism (B). .

  That is, in FIGS. 11 to 16 where the brake mechanism (B) of each caster (C) is extracted and shown, (12) is a turning cam that is built in the upper end of the stem (11) so as not to be detached. As shown in FIGS. 11 and 12, the square core shaft (13) fitted in the central square hole is between the left and right of the front bearing posts (3) and between the left and right of the rear bearing posts (3). Each is horizontally inserted and horizontally mounted.

  The circumferential surface of the rotating cam (12) can function as a caster rotation stop cam surface (12a). The circumferential surface has a shallow caster straight traveling cam groove (12b) as shown in FIG. The deep caster free turning cam grooves (12c) are also cut out. The radius of the rotation cam (12) from the center of rotation is such that the cam groove for free rotation (12c) passes from the cam surface for rotation stop (12a) of the caster (C) through the cam groove for straight travel (12b). ), The difference is changed as three stages of dimensions that become shorter as going to.

  (14) is an elevating rod inserted along the vertical axis of the stem (11), and a head (15) having a convex curved surface at the upper end thereof pushes up a return spring (compression coil spring) (16). While receiving the force, it is constantly pressed against the rotating cam (12), and similarly, the lower end portion of the elevating rod (14) is formed as an elevating plate (17). (18) is a rotation preventing tooth engraved on the lower surface of the elevator (17).

  Reference numeral (19) denotes a turning yoke fitted to the lower end portion of the stem (11) through a ball bearing (20) so as not to fall off. A wheel (21) is attached to the lower end portion of the turning yoke (19). Is supported. The diameter of the wheel (21) is about 200 mm as an example.

  Similarly, (22) is pivotally attached to the midway height position of the swing yoke (19), so that the fan-type brake panel is interposed in a partitioned state between the upper and lower plates (17) and the wheels (21). The wheel braking shoe (23) engraved on the upper surface of the wheel engages with the rotation preventing tooth (18) of the elevator board (17), while the wheel braking shoe is also lined on the lower surface of the braking board (22). (24) brakes the rotation of the wheel (21).

  Further, (25) is a sheath tube inserted through the square core shaft (13), and is composed of a round steel tube having a constant length (W1) substantially the same as the cross frame (2) of the carriage (S). These are assembled in a fitting state in which they can rotate integrally with the square core shaft (13) via the square holes (27) of the washer (26) welded to the left and right ends.

  Moreover, from the midway part where the front side sheath tube (25) and the rear side sheath tube (25) are located correspondingly, as shown in FIGS. 13 to 17, the rotary link pieces (28) are integrated in the front-rear direction. The rotating link piece (28) is in a fitted state that can rotate integrally with the angular core shaft (13).

  In this case, it has been described that the pair of front and rear linear actuator bearing stays (9) are eccentric to the left or right from the longitudinal center line of the carriage (S). As shown in FIG. 18, (28) is also in a position eccentric to the other remaining from the longitudinal center line of the carriage (S), and the braking mechanism (B) of the carriage (S) does not interfere with the linear actuator described later. It is like that.

  On the other hand, (29) is a pair of front and rear braking operation pedals, which are integrated from a round steel pipe into a substantially U-shaped frame in a plan view as shown in FIGS. (29a) is a state where the brake operation pedal bearing stay (6) of both side frames (1) of the carriage (S) is horizontally mounted, and the bearing stay (6) is rotated by a horizontal fulcrum shaft (30). It is pivotally attached freely.

  In addition, the rotation link lever (31) positioned corresponding to the rotation link piece (28) on the sheath pipe (25) in the longitudinal direction opposite from the mounting boss (29a) of each brake operation pedal (29). Is overhanging.

  Further, the pair of front and rear rotary link levers (31) are substantially L-shaped in a side view as shown in FIG. 17, and one end of each of the rotary link levers (31) is raised and lowered with the rotary link piece (28) on the sheath tube (25). While being pivotally connected via a link rod (32), the other end portions of the front rotation link lever (31) and the rear rotation link lever (31) are located below the carriage (S). It is also pivotally connected via the extending forward / backward link rod (33).

  As a result, from the raised state (see the chain line in FIG. 17) in which the head (15) of the lifting rod (14) is engaged with the caster free turning cam groove (12c) of the rotating cam (12), the braking is performed. By depressing the pedal bar (29b) at the tip of the operation pedal (29), it is built into the stem (11) of the caster (C) via the sheath tube (25) and the square shaft (13). The rotating cam (12) is rotated by a certain angle while resisting the pushing-up biasing force of the return spring (16), and the lifting rod is moved into the caster straight traveling cam groove (12b) of the rotating cam (12). When the head (15) of (14) is engaged, the swivel prevention teeth (18) of the lift plate (17) in the lowered lift rod (14) become the swirl prevention teeth (23) of the brake plate (22). Mesh with the cass Chromatography (C) is impossible turning, performs only the straight running.

  Then, the brake operation pedal (29) is further stepped on from the straight traveling state of the caster (C) to rotate the rotating cam (12) by a predetermined angle, and the caster rotation of the rotating cam (12) is performed. When the head (15) of the elevating rod (14) is engaged with the stop cam surface (12a), the elevating plate (17) of the elevating rod (14) that is lowered further lowers the brake plate (22). In order to push down the brake board (22) while maintaining the meshed state with the wheel, the rotation of the caster (C) is stopped by the frictional force of the wheel brake shoe (24).

  In that case, out of a total of four casters (C), the left and right pairs are connected and integrated through the square core shaft (13) and the sheath tube (25), and the sheath tube (25). And a pair of front and rear brake operation pedals (29) pivotally connected to each other by a lifting / lowering link rod (32) are pivotally connected via a front / rear link rod (33). By depressing the operation pedal (29), a total of four casters (C) can be braked (rotation stopped) at the same time, run straight, or freely rotated 360 degrees to make an emergency. Convenient for use and patient safety.

  However, a two-way caster (C) in which only the straight traveling cam groove (12b) of the rotating cam (12) is omitted may be adopted.

  Next, (A) is a pair of front and rear electric linear actuators that serve as a drive source for the lift mechanism (U), and is installed in the main body case (34) as shown in FIGS. A reversible motor (35), a screw spindle (36) rotated by the reversible motor (35), a transmission nut (37) screwed and fastened to the reversing motor (35), and a screwed state covering the screw spindle (36) The output advancing / retracting rod (38) connected and integrated with the transmission nut (37) is provided so that the output advancing / retreating rod (38) is reciprocated linearly by the reversible motor (35). It has become. (39) is a transmission bevel gear device that is inserted between the reversible motor (35) and the screw spindle (36).

  Then, the pair of front and rear linear actuators (A) are arranged in a symmetrical inclined arrangement as shown in FIG. 26, and the lower base end mounting stay (40) of each main body case (34) is linear with the carriage (S). While being pivotally attached to the actuator bearing stay (9) via a horizontal fulcrum shaft (41), the upper tip of the remaining output advance / retreat rod (38) is an actuator link piece (to be described later) of the lift mechanism (U) and It is pivotally connected.

  (42) is a control unit for controlling the linear actuator mounted in the control unit support frame (7) of the cart (S), and the support frame (7) can be inserted and removed from the left and right lateral directions. it can. Note that a power cord plug (not shown) that extends from the control unit (42) can be plugged into a power outlet and charged.

  Further, (43) shows a hand-held remote controller of the control unit (42), in which the output advancing / retracting rods (38) of both linear actuators (A) as shown in FIGS. Two operation buttons (44) that advance or retreat at a time and four operation buttons (45) that advance or retreat separately are installed in parallel.

  Therefore, the control unit (42) is remotely operated by selecting and using the operation buttons (44) and (45), and the lifting rack (R) of the patient support deck (FD) (RD) is set as shown in FIGS. The patient can be tilted not only in a horizontal bed state but also in a head-up state or a head-down state as shown in FIGS. 31 and 32, which is extremely convenient for use as an operating table, a treatment table, etc. Correspondence to is also expanded.

  As the remote controller (43), it is possible to employ a wireless system. (Α) indicates the maximum inclination angle (for example, about 18 degrees) of the lifting rack (R) in the head-up state or the head-down state.

  The lifting rack (R) mentioned above has, for example, a width (W3): about 600 mm × a length (L2): about 2009 mm from a pair of left and right side frames (46) and a pair of front and rear cross frames (47). As a size, the frame is integrated into a rectangular shape in plan view extending in the front-rear direction as shown in FIGS.

  Both side frames (46) and both cross frames (47) of the lifting rack (R) are made of square steel pipes, and a pair of left and right hand push handles (48) are erected from the rear surface of the rear cross frame (47). Yes. Therefore, by holding this, the cart (S) can be run lightly.

  However, the hand handle (48) on the heel has an inverted L-shape facing each other as viewed from the rear, and as shown by the chain line in FIGS. 4 and 7, it can be folded inward from its mid-height position. It has become.

  In addition, a total of four cushion rollers (49) are pivotally supported on the lateral ends of the cross frames (47) that slightly protrude from the side frames (46). During the traveling of (S), it strikes against other objects as soon as possible to relieve the shock.

  Furthermore, (G) is a pair of left and right foldable handrail units. As shown in FIG. 40, the horizontal top rail (50) extending in the front-rear direction and the lifting rack (R) are shown. A mounting base (51) welded in parallel with the top rail (50) to the outer side surfaces of both side frames (46), and a plurality of the top rail (50) and the mounting base (51) interposed between the upper and lower sides. From the parallel link struts (52) of the book, it is framed into an overall parallel link mechanism. (53) (54) is a horizontal fulcrum shaft in which the upper and lower ends of each link column (52) are pivotally attached to the top rail (50) and the mounting base (51).

  In addition, in this case, the top rail (50) has a substantially inverted U-shaped cross section and extends forward from the front link strut (52). (55) is a grip lever for raising and lowering the handrail unit having a certain length, and as is apparent from FIGS. 41 to 44, the front base end thereof is horizontally connected to the projecting front end portion of the top rail (50). On the other hand, a bent groove (58) with a lock pin, which will be described later, is cut out in a bent horizontal piece (57) that also forms the rear end of the grip lever (55). ing.

  Reference numeral (59) denotes a connecting block that is located near the intersection of the front link strut (52) and the top rail (50), and is fitted and integrated into the top rail (50). Thus, a substantially pin-shaped lock pin (60) with a large diameter is vertically inserted and penetrated into the hanging piece parallel to the link support (52). Reference numeral (61) denotes a return spring (compression coil spring) that constantly pushes and urges the lock pin (60) in the locking direction, and this is also enclosed and installed in the hanging piece of the connecting block (59).

  A pin cradle (62) that engages with the hanging piece of the connection block (59) is fitted and integrated with the frontmost link column (52) in a non-rotating state, and the pin cradle ( As shown in FIG. 43, the lower end of the lock pin (60) is inserted into the vertical pin receiving hole (63) of 62) from above.

  Therefore, the top rail (50) and the link column (52) of the handrail unit (G) are maintained in an upright state as shown in FIG. It can function as a safe fence.

  On the other hand, the locking groove (58) cut out in the bent horizontal piece (57) forming the rear end of the grip lever (55) is locked to the neck of the lock pin (60), and therefore If the grip lever (55) is lifted around the fulcrum shaft (56) at the front base end so as to be gripped against the urging force of the return spring (61), the lower part of the lock pin (60) As shown in FIG. 44, the tip is extracted from the pin receiving hole (63) of the pin cradle (62) and floats.

  As a result, the handrail unit (G) can be pushed down and flattened as shown in FIG. 45, and in the folded state, the top rail (50) is a top plate to be described later of the patient support deck (FD) (RD). The patient can be transferred without any trouble because it is retracted to a slightly lower height. Reference numeral (64) is a positioning stopper for receiving the link strut (52) in the folded state, and is integrally projected laterally from the mounting base (51).

  The lift mechanism (U) of the lifting rack (R) operated by the pair of front and rear of the linear actuator (A), as extracted and shown in FIGS. The arm (65) is composed of a total of four lower lift arms (66), one pair at the front and rear, and the upper lift arm (65) and the lower lift arm (66) are separated from each other by a pair of left and right refractive fulcrum shafts ( 67).

  That is, the front lower lift arm (66) and the rear lower lift arm (66) that form the lift mechanism (U) have the same configuration, and therefore, if described as each of them, a pair of left and right lower arms The lift arm (66) is machined from a channel groove type steel or square steel pipe of a certain length (for example, about 358 mm), and a horizontal short fulcrum bearing pipe (68) is welded as an outwardly projecting state at its upper end. Has been.

  A short mounting boss (69) is also welded to the corresponding lower ends of the pair of left and right upper lift arms (65), and the fulcrum bearing tube (68) is welded from the mounting boss (69). The upper lift arm (65) and the lower lift arm (66) are pivotally connected to each other by a pair of left and right horizontal fulcrum shafts (67) inserted into the lower part. (70) is a retaining screw for the fulcrum shaft (67), (71) is a bearing bush for the fulcrum shaft (67), and (d2) is the left and right mutual spacing (for example, about 470 mm) of the upper lift arms (65). Show.

  Reference numeral (72) denotes a long mounting boss welded in a horizontal penetrating horizontal state to the lower ends of the pair of left and right lower lift arms (66), for example, a round having a fixed length (W4) of about 442 mm. The lower lift arms (66) are connected and integrated with each other. The distance (d3) between the left and right lower lift arms (66) is, for example, about 380 mm.

  Moreover, the link piece (73) corresponding to the output advancing / retracting rod (38) of the linear actuator (A) is in the projecting state in the opposite longitudinal direction at the middle part of the horizontal long mounting boss (72). Welded. (73a) is a horizontal fulcrum shaft that pivotally connects the link piece (73) and the output advance / retreat rod (38). The link piece (73) and the lower lift arm (66) maintain a constant and unchanged crossing angle (β) of, for example, about 90 degrees when viewed from the lateral direction.

  The horizontal mounting boss (72) fixed and horizontally mounted on the lower ends of both lower lift arms (66) corresponds to the fulcrum bearing pipe (5) of the lift mechanism support frame (4) in the carriage (S). It is pivotally attached to the support frame (4) by a pair of left and right fulcrum shafts (74) inserted from the fulcrum bearing tube (5) into the mounting boss (72). (75) is a bearing bush of the fulcrum shaft (74).

  On the other hand, each of the upper lift arms (65) forming the lift mechanism (U) is also processed from channel channel steel or square steel pipe, but the upper lift arm (65) on the front side thereof is short (for example, about 180 mm). The upper lift arm (65) on the rear side is long (for example, about 228 mm), and the difference is changed only in the length dimension.

  A horizontal reinforcing plate (76) that maintains a constant crossing angle (γ) with the upper lift arm (65) is welded to the outer surface of the upper end portion of the rear upper lift arm (65), Moreover, the reinforcing plate (76) is assembled and integrated with a plurality of fixing bolts (78) to the inner side surface of the side frame (46) in the lifting rack (R) via the spacer (77) as shown in FIGS. It has become. The crossing angle (γ) is, for example, about 100 degrees when viewed from the lateral direction.

  Compared to such a rear upper lift arm (65), the outer surface of the upper end of the front upper lift arm (65) also has the same crossing angle (γ) (invariable with the upper lift arm (65)). A horizontal reinforcing plate (79) that keeps about 100 degrees as exemplified above is welded. From now on, a plurality of roller support shafts (80) as shown in FIGS. Thus, the idle rollers (ball bearings) (81) are each supported.

  (82) is a slide guide rail for receiving the idler roller (81) of the front upper lift arm (65), which is made of a channel groove steel that opens inward, and the side frame (46) in the lifting rack (R). Are welded as a fixed length (L3) (for example, about 400 mm) along the front-rear direction as shown in FIGS.

  That is, the rear upper lift arm (65) that forms the lift mechanism (U) of the lifting rack (R) maintains a constant crossing angle (γ) to the side frame (46) of the lifting rack (R). The front upper lift arm (65) maintains the same constant crossing angle (γ) as the side frame (46) of the lifting rack (R), while maintaining the same sliding guide rail ( 82), it can be moved back and forth in the front-rear direction.

  Therefore, as is clear from FIGS. 27 to 32, when the lifting mechanism (U) is lifted and lowered by the lifting rack (R), the slide guide rail may cause the lifting rack (R) to swing and meander in the front-rear direction. (82), the idler roller (81) moves forward and backward to reliably absorb itself and keep the lifting rack (R) at its constant crossing angle (β) (γ). As a stable posture state, it can be moved up and down linearly in the vertical direction, and this is the same when the lifting rack (R) is tilted in a patient head-up state or head-down state. As a result, the lifting mechanism (U) of the lifting rack (R) exhibits a high load resistance of about 250 kg, and the rigid upper lift arm (65) and lower lift arm (66) make the patient feel uncomfortable and anxious. There is no risk of giving.

  Further, since the slide guide rail (82) for receiving the idler roller (81) of the front upper lift arm (65) is welded to the lower surface of the side frame (46) in the lifting rack (R), its upper lift. Even if the lower lift arm (66) is adjacent to the inner position of the arm (65), the left and right mutual gap (X) of the lift mechanism (U) can be widely secured.

  In addition, the upper surface of the side frame (1) forming the carriage (S) has a certain height difference (h2) from the fulcrum bearing tube (5) of the long mounting boss (72) located at the lower end of the lift mechanism (U). ) And the height of the ground (h1) is set low, so that the lifting rack (R) is set to the maximum limit as shown in FIGS. In the state of being raised to a height of about 948 mm), the vertical gap (Y) between the lifting rack (R) and the carriage (S) can be ensured as, for example, about 948 mm.

  As a result, the lift rack (R) is the ceiling surface, the lift mechanism (U) is the left and right side wall surfaces, and the cart (S) is the floor surface. The C-arm of the C-arm surgical X-ray diagnostic imaging apparatus (E), which will be described later, is extremely easy without any trouble in either the front-rear direction or the left-right lateral direction as shown in the use state of FIGS.・ Smoothly insert and take emergency patients and perform fluoroscopy.

  Next, a pair of front and rear patient support decks (FD) (RD) will be described. The front (foot) support deck (FD) corresponding to the lower body of the patient is in a horizontally fixed installation state. The rear (head) support deck (RD), which is positioned corresponding to the upper body of the patient, is in a generally horizontal bed state with the front support deck (FD), and from the seam to this, the pressure cylinder described later is used. In addition, it is possible to perform an undulating rotation operation (reclining operation).

  That is, the front support deck (FD) is bent and formed in a substantially U shape (for example, L4: about 1039 mm × W5: about 600 mm) in a plan view extending in the front-rear direction from the square steel pipe, while the rear side The support deck (RD) is bent from the same square steel pipe into a substantially U shape (for example, L5: about 804 mm × W5: about 600 mm) in plan view facing the front support deck (FD). It has an elongated rectangular shape like 46 and 47.

  Such a front support deck (FD) is in a fixed installation state in which the front support deck (FD) is welded and integrated on both side frames (46) of the lifting rack (R) via a plurality of support pillows (83). The rear support deck (RD) is not fixed to both side frames (46) of the lifting rack (R), and a pair of left and right stoppers (84) projecting integrally upward from both side frames (46). By this, it is in a state where it can be received from below and can float. (H3) is a constant (for example, about 60 mm) pressure cylinder storage gap secured between the upper and lower sides of the rear support deck (RD) and the lifting rack (R).

  (85) is a pair of left and right side connection plates welded to the outer surface of the rear end portion of the front support deck (FD) via a washer (86) as shown in FIG. A tip portion projecting rearward beyond the joint with RD) is pivotally connected to the outer surface of the front end portion of the rear support deck (RD) by a pair of horizontal fulcrum shafts (87).

  Therefore, the rear support deck (RD) can be raised and lowered (reclining operation) around its horizontal fulcrum shaft (87) with respect to the front support deck (FD). Reference numerals (88) denote bearing bushes of a fulcrum shaft (87) projecting integrally laterally from the rear support deck (RD), and are respectively inserted in the fitting surfaces with the side connection plate (85).

  Also, (89) is a pair of left and right pneumatic cylinders that integrally project upward from both side frames (46) of the lifting rack (R) while being positioned near the front end of the rear support deck (RD). The bearing stays for use (90) are a pair of left and right pneumatic cylinder bearing stays projecting downward integrally from the vicinity of the rear end of the rear support deck (RD) as a pair of left and right facing and corresponding thereto. A pair of left and right pneumatic cylinders (preferably gas dampers) (91) are interposed between the front and rear of such bearing stays (89) and (90).

  Furthermore, the pneumatic cylinder (91) reclines the rear support deck (RD) around the fulcrum shaft (87) with respect to the front support deck (FD), and its constant inclination angle (θ) (for example, about As a so-called tension strut that can maintain the standing posture state of 100 degrees), the front base end of the cylinder main body (92) is pivoted to the bearing stay (89) on the lifting rack (R) side by the fulcrum pin (93). On the other hand, the rear end of the piston rod (94) is pivotally attached to the bearing stay (90) on the rear support deck (RD) side via a fulcrum pin (95). Therefore, the rear support deck (RD) can be erected as a backrest having a constant inclination angle (θ) as shown in FIG. 5, and the patient can be kept in a stable posture in which the patient is drowned.

  Further, reference numeral (96) denotes a bed (top plate) attached and fixed to the upper surface of the front support deck (FD) by a plurality of countersunk screws (97) and the like in a cover state in the border frame. It is made of a carbon fiber reinforced resin plate (CFRP), an acrylic resin plate or the like having a certain thickness that can pass through.

  Moreover, the rear end edge of the bed (96) is cut as a back-up inclined surface by a certain angle (δ) (for example, about 20 to 30 degrees) as shown in FIGS. On the surface, an elastic film (98) made of polyester fiber or other synthetic fiber is attached and coated in a relatively thick polymerization state.

  (99) is a backrest (top plate) fixed to the upper surface of the rear support deck (RD) by a plurality of countersunk screws (100) and the like so as to cover the inside of the border frame. It consists of a carbon fiber reinforced resin plate (CFRP), an acrylic resin plate or the like having the same constant thickness as the bed (96) of the front support deck (FD).

  And the front end edge of the backrest (99) is cut into a parallel state of the same constant angle (δ) as the rear end edge of the bed (96), and the rising slope cut surface is the same as shown in FIG. A synthetic fiber elastic membrane (101) is applied and covered.

  In other words, the bed (96) of the front support deck (FD) and the backrest (99) of the rear support deck (RD) are cut at a constant inclination angle (δ) at the seam, and the two facing each other. By interposing the elastic membranes (98) and (101) that can adhere to each other, the pair of front and rear patient support decks (FD) and (RD) are placed in an overall horizontal bed state as shown in FIG. When the patient is seen through and photographed, a shadow based on the breathability of the seam is prevented from occurring in the X-ray image.

  The low-floor type stretcher of the present invention has the above-described configuration, and the left and right mutual spacing (W2) of the caster bearing posts (3) in the carriage (S) and the support frame for the lift mechanism of the carriage (S) ( 4) The length (W4) of the horizontal mounting boss (72) in the lift mechanism (U) pivotally attached to the lift mechanism (U) is set to be narrower than the fixed width (W3) of the lift rack (R). ) Is lowered so that it does not interfere with the carriage (S).

  In addition, the lifting rack (R) of the patient support deck (FD) (RD) can be adjusted in its installation height by a lift mechanism (U) that uses an electric linear actuator (A) as a drive source. The patient support in a state where it is lowered to the minimum installation height (for example, the ground height of the patient support deck—about 400 mm) substantially the same as the cross frame (2) of the cart (S) as shown in FIGS. The patient support deck (FD) (RD) can be carried out quickly and comfortably to carry emergency patients to the deck (FD) (RD) or to transfer them to the existing hospital bed. Even if an emergency patient falls from there, there is no risk of increasing the injury rate.

  Further, the control unit (42) of the linear actuator (A) is remotely controlled by the hand-held remote controller (43), and the patient support deck (FD) (RD) is set to a desired installation height as shown in FIGS. In a horizontal bed state, in a head-up state or in a head-down state at a desired inclination angle (α) as shown in FIGS. 31 and 32, or in a rear support deck relative to the front support deck (FD). (RD) can be kept in a reclining state at a constant inclination angle (θ) as shown in FIG. 5 and can be conveniently carried out for transport, surgery, treatment, etc. depending on the state of the emergency patient. It is.

  In particular, in the state where the lifting rack (R) of the patient support deck (FD) (RD) is raised to the maximum limit (for example, the height of the patient support deck above the ground-about 948 mm), the lifting rack (R) and the carriage ( Since the upper and lower mutual gap (Y) with respect to S) and the left and right mutual gap (X) of the lift mechanism (U) are widely secured, as shown by the chain line in FIGS. The C-type arm (102) of the surgical X-ray diagnostic imaging apparatus (E) in which the X-ray tube (103) and the X-ray detector (image intensifier) (104) are oppositely installed at the other end. The X-ray diagnostic imaging device (E) can be used to easily and smoothly insert the stretcher into the vast inner space (Z) of the stretcher easily and smoothly without any restriction in either the front-rear direction or the left-right direction. Take a picture of the affected area or see through Bets can be, it is as it can collect accurate X-ray images.

  In any state shown in FIGS. 27 to 32, even when the target affected area of the emergency patient is imaged and seen through with the C-arm X-ray diagnostic imaging apparatus (E), the patient's operating table or treatment table, Even when used as other treatment tables, a total of four casters (C) attached to the cart (S) can be stopped simultaneously by the operation pedal (29) of the braking mechanism (B). Therefore, combined with the fact that the lifting rack (R) is moved up and down by the lift mechanism (U) while maintaining a constant and constant crossing angle (β) (γ) at all times, convenience in use and patient It is extremely excellent in safety.

  Next, FIGS. 52 to 55 show a modified embodiment of the present invention. As will be apparent, the hanging pole (105) of an infusion irrigator that can be used as an accessory (optional item) is moved up and down. The rack (R) may be vertically inserted into the left or right end of the rear cross frame (47) so as to be freely inserted and removed from above. The reference numeral (106) in FIGS. 2 and 3 is the pole receiving hole.

  In that case, as suggested by the comparison between FIGS. 52, 53 and 54, the hanging pole (105) is made to be extensible and pivoted so that it can be folded over around a fulcrum near its lower end. It is preferable to keep it.

  In addition, an upright storage rod (107) for an oxygen cylinder is inserted into and supported from the upper side to the same left or right one end or the other end of the rear cross frame (47) in the lifting rack (R). Also good. The reference numeral (108) in FIGS. 2 and 3 suggests a receiving hole for the locking hook (109) in the upright storage rod (107).

  Further, reference numeral (110) denotes a TV monitor mount, which is an inverted U-shaped leg frame (111) which is detachably inserted into an intermediate portion of the front cross frame (47) in the lifting rack (R), and an upper end thereof. A shelf plate (115) pivotally pivoted via a horizontal fulcrum pin (114) to a pair of left and right fixed support pieces (113) projecting from the horizontal bar (112) of the section to a forwardly rising and inclined state By mounting and using a TV monitor (116) on a shelf plate (115) that is received and fixed as a horizontal state, the target affected part that is being seen through with the X-ray diagnostic imaging apparatus (E) is displayed. It is desirable to determine that images can be recalled. Reference numerals (117) in FIGS. 2 and 3 are receiving holes for the leg frames (111).

  If it does so, there exists an effect which can perform required treatments, such as imaging | photography, fluoroscopy, an operation | movement, and a treatment of an emergency patient by the said X-ray image diagnostic apparatus (E) more appropriately and conveniently. In addition, since the other structure and effect | action (usage) in the deformation | transformation embodiment of FIGS. 52-55 are substantially the same as the said basic embodiment, the corresponding code | symbol with FIGS. Just fill it in and omit the detailed explanation.

It is a whole side view of the horizontal bed state which raised the stretcher which concerns on basic embodiment of this invention. It is a top view of FIG. FIG. 3 is a plan view showing a patient support deck removed from FIG. 2. It is the rear view seen from the back of FIG. FIG. 2 is a side view of a state where the lifting rack is lowered from FIG. 1 and the rear support deck is reclined. It is a whole side view of the use condition which inserted the C-type arm type X-ray diagnostic imaging apparatus from the back of FIG. It is the whole use side view of the use condition which inserted the C type arm type X-ray diagnostic imaging apparatus from the horizontal direction of FIG. It is a side view which extracts and shows a trolley | bogie. It is a bottom view of FIG. It is a front view of FIG. It is a partially expanded front view which extracts and shows the braking mechanism of a caster. 12 is a sectional view taken along line 12-12 of FIG. It is a front view which extracts and shows a front square axis and a sheath tube. FIG. 14 is a side view of FIG. 13. It is a front view which extracts and shows a back side square core axis and a sheath tube. FIG. 16 is a side view of FIG. 15. It is a whole side view which shows the braking operation system of a caster. It is a top view of FIG. It is a top view which extracts and shows the brake operation pedal of the front side. FIG. 20 is a side view of FIG. 19. It is a top view which extracts and shows the rear brake operation pedal. It is a side view of FIG. It is a side view which extracts and shows an electric linear actuator. It is a top view of FIG. FIG. 24 is a side sectional view of FIG. 23. It is a whole side view which shows the connection state of an electric linear actuator and a lift mechanism. It is a side view of the state of the horizontal bed which raised the raising / lowering rack of the patient support deck to the maximum limit. It is a side view of the state which lowered the raising / lowering rack to the halfway height position from FIG. It is a side view of the state which lowered the raising / lowering rack to the minimum from FIG. It is an expanded sectional front view of FIG. It is a side view of the head down state which inclined the lifting rack of the patient support deck. It is a side view of the head up state which similarly inclined the lifting rack. It is a sectional front view extracting and showing a back side lift mechanism. It is a side view of FIG. It is a cross-sectional front view which extracts and shows the front side lift mechanism. FIG. 36 is a side view of FIG. 35. It is a top view which extracts and shows a lifting rack. It is a side view of FIG. It is the 39-39 line expanded sectional view of FIG. It is a whole side view which extracts and shows a handrail unit. It is an enlarged side view which extracts and shows a part of FIG. FIG. 42 is a cross-sectional view taken along line 42-42 of FIG. 41. FIG. 43 is a cross-sectional view taken along line 43-43 of FIG. 42. FIG. 44 is a side sectional view showing a lying state from FIG. 43. FIG. 41 is an overall side view corresponding to FIG. 40 showing the handrail unit lying down. It is a top view which extracts and shows a patient support deck. FIG. 47 is a side view of FIG. 46. It is an expanded sectional top view which extracts and shows the joint part of a bed and a backrest. It is an expanded sectional side view which extracts and shows the joint part of a bed and a backrest. It is a top view which shows the decomposition | disassembly state of a bed and a backrest. It is the 51-51 line expanded sectional view of FIG. It is a whole side view corresponding to FIG. 1 which shows the deformation | transformation embodiment based on this invention. FIG. 53 is a side view showing a state in which the lifting rack is lowered from FIG. 52 and the rear support deck is reclined. FIG. 53 is a plan view of FIG. 52. It is the rear view seen from the back of FIG. It is a cross-sectional front view corresponding to FIG. 30 shown as the state which lowered | hung the conventional stretcher to the minimum.

Explanation of symbols

(1) Side frame (2) Cross frame (3) Caster bearing post (4) Lift mechanism support frame (5) Lift mechanism fulcrum bearing tube (7) Control unit support frame (12 ) ・ Rotating cam (13) ・ Square shaft (14) ・ Elevating rod (16) ・ Return spring (17) ・ Elevating board (19) ・ Rotating yoke (21) ・ Wheel (22) ・ Brake board (25)・ Sheath tube (28) ・ Rotating link piece (29) ・ Brake operating pedal (30) ・ Supporting shaft (31) ・ Rotating link lever (32) ・ Elevating link rod (33) ・ Backward and forward link rod (34)・ Body case (35) ・ Reversible motor (36) ・ Screw spindle (37) ・ Transmission nut (38) ・ Output forward / backward rod (39) ・ Bevel gear unit (41) ・ Support shaft (42) ・ Control unit (43) ・ Remote controller (44) (45) ・ Operation buttons (46) ・ Side frame (47) ・ Cross frame (48) ・ Hand push handle (49) ・ Cushion roller (50) ・ Top rail (55) -Grip lever (65)-Upper lift arm (66)-Lower lift arm (67)-Refraction fulcrum shaft (68)-Support bearing shaft (69)-Mounting boss (72)-Mounting boss (73)-Actuator link Piece (74), Support shaft (76), Reinforcement plate (77), Spacer (78), Fixing bolt (79), Reinforcement plate (80), Roller support shaft (81), Free-rolling roller (82), Slide guide Rail (85), side connection plate (87), fulcrum shaft (89) (90), bearing stay (91), pneumatic cylinder (96) Bed (top plate)
(98) (101)-Elastic membrane (99)-Backrest (top plate)
(102) · C-shaped arm (103) · X-ray tube (104) · X-ray detector (105) · Hanging pole (107) · Standing storage rod (110) · TV monitor stand (111) · Leg frame (112)-Horizontal bar (113)-Fixed support piece (115)-Shelf plate (116)-TV monitor (117)-Leg frame receiving hole (A)-Electric linear actuator (B)-Braking mechanism (C) -Casters (E)-C-arm X-ray diagnostic imaging equipment (FD)-Front patient support deck (RD)-Rear patient support deck (G)-Handrail unit (R)-Lift rack (S)-Carriage (U) · Lift mechanism (X) · Left and right mutual gap (Y) · Vertical gap (Z) · Internal space

Claims (3)

It was pivotally mounted as a pair of symmetrical front and rear to a cart (S) supported by a total of four casters (C) and a control unit support frame (7) projecting downward from the middle of the cart (S). An electric linear actuator (A), a control unit (42) for controlling a linear actuator installed in the support frame (7), and a lift mechanism (U) refracted by using the linear actuator (A) as a drive source ), A lifting rack (R) that is lifted and lowered by the lift mechanism (U), and a pair of front and rear patient support decks (FD) (RD) installed in parallel on the lifting rack (R),
The control unit (42) is operated by a hand-held remote controller (43), so that the patient support deck (FD) (RD) is not only in a horizontal bed state at a desired installation height, but also at a desired inclination angle (α In a stretcher that can be kept in a head-up state or a head-down state in
From the pair of left and right side frames (1) and the pair of front and rear cross frames (2) welded in a stacked state to the upper surfaces of the left and right side frames, the cart (S) is framed in an elongated planar shape in the front and rear direction, The caster bearing posts (3) are respectively suspended from the projecting lateral ends of the cross frame (2) so that the distance between the left and right sides (W2) is smaller than the constant width (W3) of the lifting rack (R). While welding upright,
The lifting mechanism (U) of the lifting rack (R) is pivotally supported by a total of four upper lift arms (65), one pair at the front and rear, and the lower end of each lift mechanism via a separate horizontal fulcrum shaft (67). Formed from a total of four lower lift arms (66), one pair of front and rear connected,
A pair of horizontal front and rear mounting bosses (72) welded in a horizontal state to the lower end of the lower lift arm (66) are arranged more than the side frame (1) of the carriage (S) in the caster bearing post (3). From the tall upper half, pivotally attached to the tip of the lift mechanism support frame (4) protruding in the opposite longitudinal direction,
The intermediate part of the mounting boss (72) and the output advance / retreat rod (38) of the linear actuator (A) are pivotally connected to each other,
Among the upper lift arms (65) forming the lift mechanism (U), the idler roller (81) pivotally supported on the upper end of the front upper lift arm (65) is connected to the side frame ( 46) is engaged with a slide guide rail (82) welded to the lower surface of 46), while allowing the upper end of the remaining rear upper lift arm (65) to be connected to the side frame (46) of the lifting rack (R). Assemble and fix
The lifting mechanism (U) is set so that the lifting rack (R) can be lowered to almost the same installation height as the cross frame (2) of the carriage (S) without interfering with the carriage (S). Low floor type stretcher characterized by Reinforcing plates (76) and (79), which are separately provided at the upper end of the upper lift arm (65), and the upper lift arm (65) itself in the front-rear direction while maintaining a constant crossing angle (γ) in a side view. Welding to an extended horizontal state,
From the reinforcing plate (79) of the front upper lift arm (65), a plurality of horizontal roller support shafts (80) are integrally projected laterally so as to engage with the slide guide rail (82) and can freely move forward and backward. While supporting the rolling roller (81),
The reinforcing plate (76) of the remaining rear upper lift arm (65) is assembled and integrated to the side frame (46) of the lifting rack (R) by a plurality of fixing bolts (78).
For pivotally connecting the output advancing / retracting rod (38) of the electric linear actuator (A) from the intermediate portion of the horizontal mounting boss (72) welded in a horizontal state to the lower end of the lower lift arm (66) The link piece (73) is integrally extended in the opposite front-rear direction so as to maintain a constant crossing angle (β) that is invariable in side view with the lower lift arm (66) itself. The low floor type stretcher according to 1.   The front support deck (FD) is fixed and integrated with the upper surface of the lifting rack (R), while the rear support deck (RD) is fixed to the front support deck (FD) by moving the pneumatic cylinder (91) forward and backward. The low-floor type stretcher according to claim 1, wherein the stretcher is pivotally connected so that it can be reclined by an inclination angle (θ).

Images