JP2013226369A - Tray device for cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tray device for a cart dissolving drawbacks such as rattling and accidental movement generated between a tray and a support rail in the cart.SOLUTION: In a tray device 4 for a cart provided with a tray slidably supported via rails 42, the tray includes a box-shaped tray body 41 that has the horizontal width stored in the horizontal inner width of supports and has a substantially rectangular upper face in a plan view, that is fully opened, and a double side wall 41A corresponding to at least the left/right supports in the body. Each rail slidably supporting the tray in the double side wall includes: an L-cross-sectional rail body formed of a horizontal-attitude root portion that is mounted to an inner face of the left or right support facing each other, and a vertical portion that is vertically erected from a width-directional tip end of the root portion and extends in the longitudinal direction of a base frame; and a control part that is stored in the double side wall of the tray, and suppresses rattling generated between the double side wall and the rail and accidental movement on the rail.

Description

  The present invention relates to a tray device for a cart such as a nurse skirt used in a hospital or the like.

  The nurse puts a personal computer etc. on the top plate of the cart and pushes the cart loaded with medicines for each patient, syringes, sphygmomanometers, etc. to the side of each patient's bed. This is a dedicated cart for nurses in the hospital that is used in such a way that various measures necessary for each patient are taken and returned to the nurse center. Various types of carts have been proposed and put into practical use. .

Examples of known skirts include the following.
That is, a base frame having four casters at each apex of a substantially rectangular shape when viewed from the plane, two or four columns upright on the left and right sides of the frame, and an upper end of the column It is a form provided with a top plate that can be moved up and down or fixed in height, and one or more trays that are installed between the bottom of the top plate and the upper surface of the base frame in this column. . It is also known that carts equipped with such toilets include carts other than the nurse skirt.

  The tray in a known cart is provided with a plurality of stages of slide rails for slidably supporting the trays of each stage on two or four columns positioned on the left and right sides of the base frame. Most of them are provided in such a manner that the supported portion formed on the left-right side is supported and the tray can be slid back and forth on the rail.

  The reason why the trays of each stage arranged in the cart in the above-described manner are slidably supported is that in the case of the nurse skirt, it is easy to load / unload the load on the tray, or This is to prevent the nurse's legs and the rear end of the toilet from interfering when the nurse and the nurse skirt gather to use the personal computer on the cart top.

  However, since it is not preferable in terms of appearance that the supported part formed on the edge of the rail or the tray for supporting the tray so as to be slidable back and forth is not preferable, the design of the part needs to be devised. Occurs.

  On the other hand, with conventional trays, play or play between the supported part of the tray and the rail that slidably supports the part may cause rattling noise due to floor steps or unevenness when the cart is running. A problem has been pointed out that the play between the rail and the supported portion of the tray is too large, and the tray moves carelessly due to inertia when the cart is stopped.

Japanese Patent No. 4846345 Japanese Patent No. 4345450 Japanese Patent No. 4943251 JP 2012-19900 A

  Therefore, an object of the present invention is to provide a cart tray device that eliminates the problems of rattling noise and inadvertent movement that occur between the tray and the support rail in the cart.

  The configuration of the cart tray device of the present invention, which has been made for the purpose of solving the above-mentioned problems, is slidably supported via rails between left and right support columns standing on a base frame having casters. In the tray apparatus for a cart provided with a tray, the tray has a box-like tray main body having a generally rectangular upper surface in plan view and having a left-right width that fits within the left-right inner width of the support column, and at least the above-described main body in the main body. A rail having a double side wall formed correspondingly to the left and right columns, and a rail that slidably supports the tray on the double side wall is a base portion of a horizontal posture that is attached to the opposing inner surfaces of the left and right columns. A rail body having a substantially L-shaped cross section comprising a vertical portion standing vertically from the tip of the base portion in the width direction and extending in the front-rear direction of the base frame; Provided in the body, provided with looseness generated between the double side wall and the rail by being accommodated in the double side wall of the tray, and a control unit for suppressing inadvertent operation on the rail. Features.

In the tray device of the present invention described above, the double side wall is provided with a holding portion for restrainingly holding at least the toilet slide end inside, and as the holding portion, the slide end on the rail of the tray is provided. Is formed as a locking piece that engages with the recesses of the control unit provided at both ends of the rail body and stops the sliding of the tray by cooperating with the recesses to perform the restraining action. There is something.
With this configuration, in the tray device of the present invention, since the position is restrained and held by the cooperative action of the locking piece and the recess at the position where the tray is positioned, the cart is suddenly started or suddenly stopped. But the tray doesn't slide carelessly.

  In the tray device of the present invention, the control unit provided in the rail body includes an elastic contact part that elastically contacts the inner side surface of the double side wall of the tray, and a concave part that engages the locking piece provided on the double side wall. Of course, when the cart is stopped, the tray is elastically held on the rail by the action of the elastic contact part of the control part provided on the rail even when the cart is moving. Therefore, the tray and the rail do not rattle or generate chattering due to vibration during movement, and thus the cart can be run quietly.

  In addition, the above-described quiet cart travel is performed by moving the tray vertically in the vertical direction by supporting the lower end surface outside the double side wall of the tray from the second horizontal abutting portion formed on the rail control portion. Even if backlash occurs, there is an effect of suppressing the generated backlash sound.

  The present invention relates to a tray device for a cart in which a tray that is slidably supported via a rail is provided between left and right columns that are erected on a base frame that includes casters. A tray main body having a box shape with the upper surface of a substantially rectangular shape in plan view having a left-right width that fits within the inner width, and a double side wall in which at least two side walls corresponding to the left and right support columns are formed in the main body are provided. The rail that slidably supports the tray on the double side wall is vertically raised from the base portion of the horizontal posture attached to the opposing inner surface of the left and right support columns and the width direction tip of the base portion, and the base frame A rail body having a substantially L-shaped cross section composed of a vertical portion extending in the front-rear direction, and provided in the rail body and contained in the double side wall of the tray. And the rattling noise that may occur between the rail and the tray due to the use of a cart tray device with a control unit that suppresses inadvertent operation on the rail body. To provide a cart that can realize a quiet cart traveling because it is possible to effectively suppress or prevent inadvertent movement that may occur due to excessive mechanical play between the two. Can do.

In the cart provided with an example of the tray apparatus of the present invention, the upper stage shows a state where only the rail is removed with the tray removed, the middle stage shows a state where both the tray and the rail are removed, and the lower stage shows a state where the tray is mounted. . The perspective view of the rail of the upper stage left side in the cart of FIG. The longitudinal cross-sectional front view for demonstrating the relationship between the rail of the upper stage right side in the cart of FIG. 1, and the double side wall of a tray. The perspective view which abbreviate | omitted a part of the whole right rail of the upper stage of FIG. The top view of the rail of FIG. The longitudinal side view of the principal part for demonstrating the relationship between the double side wall of the right side of a tray, and a rail.

  The cart 1 equipped with the tray device of the present invention shown in FIG. 1 has two columns 3L, 3R on the left and right sides having a top plate 2 at the upper end, as an example between the columns 3L, 3R. Each of the tray devices 4 includes a box-like tray 41 mounted so as to be slidable back and forth, and has a basic structure standing on the base frame 5.

  That is, reference numeral 5 denotes a base frame formed so as to have a substantially H shape when viewed from above, and four universal casters 9a to 9d are provided at the four corners of the frame 5. In the cart 1 of FIG. 1, the left side of FIG. 1 is the forward direction of the cart, and the front side of the cart is the rear side of the cart provided with the handle. Here, the left and right sides of the base frame 5 are composed of left and right vertical frame members 5b, 5b and a penetrating horizontal frame member 5a that joins both members 5b. The horizontal frame member 5a is provided with an offset toward the rear of the cart with respect to the length of the vertical frame members 5b and 5b. Further, the vertical frame members 5b and 5b are formed in a shallow arch shape or a low mountain shape with a slightly middle height. A fixing base 5c for a stopper 10, which will be described later, is provided on the bottom of the central portion of the horizontal frame member 5a.

  The fixed base 5c provided on the lower surface of the central portion of the horizontal frame member 5a is provided with a stopper 10 in which the stopper contact portion 10c is lowered and raised with respect to the floor by a foot-type link mechanism. The stopper 10 is a position where the skirt 1 is stopped, and when the descending pedal 10f is stepped on, the piston rod 10b having the stopper abutting portion 10c at the lower end resists spring force (not shown) by the action of the link mechanism. It is lowered and abuts against the floor surface, and this state is locked by the action of the link mechanism, and the cart 1 cannot be pushed forward. The stopper 10 is unlocked when the release pedal 10e is depressed, and the stopper contact portion 10c is raised by a spring force.

  The pillars 3L and 3R are erected on the left and right vertical frame members 5b and 5b of the base frame 5 where the horizontal frame member 5a is provided. The support pillars 3L and 3R are provided with rods 3a and 3b that move up and down at the lower base portion. Here, the rod 3b of the right support pillar 3R is formed by a rod of a gas cylinder (not shown). It is free. Further, in the left and right support columns 3L and 3R, penetrating members 31 for connecting the support columns 3L and 3R on the left and right sides are provided below the uppermost tray device 4 in the drawing.

  The lower surface of the top plate 2 is fixed to the upper ends of the rods 3a and 3b in the left and right support columns 3L and 3R. The top plate 2 is provided so that the stroke amount of, for example, about 200 mm can be raised and lowered from the top position of the top plate 2 by the action of a gas cylinder (not shown) to which the rod 3b belongs. The gas cylinder is built in the base portion (lower half side) of the right column 3R. The stroke amount of 200 mm is an example, and the numerical value is arbitrary. In this embodiment, the vertical stroke amount of 200 mm is the position where the top plate 2 is raised to the highest position, and the top plate 2 is placed above the table top plate (not shown) forming the nurse terminal. This is employed to allow the top plate 2 to be placed under the table top plate of the terminal at the position where the top plate 2 is lowered to the lowest position. Thereby, the height of the top plate 2 can be selected and the nurse skirt itself can be brought closer to the table of the nurse terminal.

  The top plate 2 includes a grip 6a for pushing (or pulling) the cart 1 to the front side (right side in FIG. 1, left side in FIGS. 2 and 3) and attachment portions 6b on both sides. The handle 6 is provided in such a manner as to protrude rearward from the lower surface of the top plate 2 via the mounting portion 6b. The handle 6 is provided with a grip 6a having a substantially oval or oval cross section by a metal pipe molded product or a synthetic resin molded product with the cross-sectional posture being inclined. The grip 6a has a substantially oval or oval shape and is inclined so that the gripping feeling of the hand when pushing the cart or the gripping feeling is made natural so as not to make the wrist angle unreasonable. In addition, the purpose is to function as an armrest when a personal computer (not shown) placed on the top board 2 is operated in a standing posture.

  The left and right struts 3L, 3R have a plurality of rail locking slots 7a and a screw hole 7b for a bracket 43, which will be described later, in the vertical direction of the intermediate part and the lower part of the opposing inner surface in the height direction. They are arranged in a pitch. In this example, the slot 7a and the screw hole 7b are provided so that the installation height of the rail body 42 that supports the tray 41 at the intermediate portion and the lower portion of the tray device 4 provided in three stages is slidable back and forth. It is for selecting and setting from. The slot 7a and the screw hole 7b may be arranged at equal pitches over the entire height direction of the columns 3L and 3R. In this way, the position of the rail body 42 at each stage can be freely selected and changed.

  Here, since all the rail bodies 42 at each stage have the same configuration, the configuration of the upper rail body 42 shown in FIG. 1 will be described with reference to FIGS.

The left and right rail bodies 42 at each stage are formed by symmetrical L-shaped members (see FIGS. 2 to 5). That is, the rail body 42 includes a horizontal base side 42a and a vertical part 42b raised 90 degrees from the tip of the base side 42a.
Near the rear end of the base side 42a of the rail main body 42, a small locking side 42c for locking the rail main body 42 to the slots 7a of the columns 3L and 3R is provided and the rail main body 42 is viewed from below. A screw hole 42d for connecting the mounting bracket 43 having a reverse L-shaped cross section to be supported is provided, and is formed in a mounting portion of the rail body 42 to the support columns 3L and 3R, which is formed wider than the other portions. The mounting bracket 43 is attached to the columns 3L and 3R by screws 43a.

  Front and rear cutouts 42e and 42f that are substantially U-shaped are formed at both ends in the lengthwise direction of the vertical portion 42b of the rail body 42. The cutouts 42e and 42f are formed on the left and right sides of the tray 41, respectively. The control member 8 acting as a control unit that acts cooperatively with the inner side surface of the double side wall 41A and effectively suppresses or prevents chattering or chattering of the tray 41 or inadvertent operation is attached. (Mainly refer to FIG. 2).

The basic relationship between the control member 8 and the double side wall 41A of the tray 41 is as follows (see FIGS. 2 to 5).
That is, the relationship between the inner wall surface 41a and the outer wall surface 41b in the double side wall 41A, and the vertical portion 42b and the horizontal root portion 42a of the rail body 42 that are accommodated in the double side wall 41A can be summarized as shown in FIG. As shown in FIG. 4, the control members 8 provided at both ends of the vertical portion 42b have double elastic contact portions 8a (hereinafter referred to as elastic portions 8a) that are elastically protruded from the surface of the vertical portion 42b. While the side wall 41A is in contact with the inner wall surface 41a via the elastic spring property, the control member 8 is laminated on the horizontal root portion 42a, and the control member 8 has an L-shaped horizontal slip. The portion 8b is provided as a second contact portion, and the lower end portion 41c of the outer wall surface 41b in the double side wall 41A is in contact with the sliding portion 8b.

  In the control member 8, the elastic portion 8 a and the horizontal sliding portion 8 b protruding in the side surface direction are formed on the front and rear in the length direction of the control member 8 via an intermediate portion 8 c. Therefore, the intermediate portion 8c is formed in a bifurcated shape (or a double wall shape) so that the vertical portion 42b of the vertical portion 42 of the rail body 42 can be sandwiched from the front and back sides, and is formed in the intermediate portion 8c. It is attached to the rail main body 42 by a mounting screw 8d from a screw hole. In FIG. 4, 42g is a screw hole for passing the screw 8d provided in the vertical portion 42b of the rail body 42, and the screw hole 8d is attached to the screw hole 42g from the inside.

The control member 8 is formed with a recess 8e near the intermediate portion 8c on the upper surface of the substantially L-shaped section having the sliding portion 8b.
The recess 8e functions as a so-called stopper for locking the locking piece 41d provided as a holding portion inside the double side wall 41A, which will be described later, to prevent inadvertent behavior of the tray 41.
On the other hand, the upper part of the elastic portion 8a provided on the control member 8 is a slope obtained by obliquely chamfering a right shoulder portion so that the upper portion of the elastic portion 8a fits smoothly within the double side wall 41A of the tray 41 without being caught. 8f (see FIG. 2).

In the longitudinal section of the double side wall 41A of the tray 41 shown in FIG. 6, before and after being locked in the recesses 8e of the front and rear control members 8 provided in the front and rear of the rail body 42 inside the side wall 41A, respectively. The locking piece 41d is provided. That is, in both slide ends where the tray 41 moves forward and backward, in order to stop and hold the slide of the tray 41, a locking piece 41d having a spring property is connected to the front portion of the double side wall 41A. An example of the holding portion is provided at the rear portion.
That is, the two locking pieces 41d are formed as symmetrical L-shaped members from the front and rear ceilings of the double side wall 41A, and are provided on the rail body 42 at the end of the front and rear sliding operation of the tray 41. By engaging with the recessed portions 8e of the front and rear control members 8, the movement of the tray 41 is stopped in cooperation with the engaged recessed portions 8e and held at that position.

  On the ceiling side inside the double side wall 41A, a partition wall 41e having a substantially mountain-shaped lower end surface shape that holds the upper end of the rail body 42 from the left and right sides of the rail cross section is the length of the double side wall 41A. They are provided at equal pitches in the middle of the direction. The partition wall 41e reinforces the cross-sectional strength of the double side wall 41A and also serves as a guide for the upper end portion of the rail body 42. As shown in FIG. 6, the partition wall 42e is coupled by a coupling wall 42f that is parallel to the inner and outer inner walls 41a and 41b of the double side wall 41A.

In the cart tray apparatus described above, the control member 8 provided on the rail main body 42 at each stage has a backlash at the time of the back and forth stroke of the tray 41, a backlash at the time of cart travel, or at the start of cart travel. It is provided for the purpose of controlling or preventing an inadvertent operation of the tray at the time of stopping.
Therefore, in the present invention, as long as the above-described object of the control member 8 can be achieved, the form and mounting portion of the control member 8 are not limited to the above-described embodiments. It is also possible.

  That is, the rail main body 42 in the above example is attached to the columns 3L and 3R by the upright side 42c in the substantially L-shaped member having the horizontal base portion 42a and the vertical portion 42b and the mounting bracket 43. The bracket 43 may be formed integrally with a base part 42a of the rail body 42 by a member integral with the base part 42a.

  In addition, the control member 8 acts on the inner surface of the double side wall portion 41A of the tray 41 to suppress rattling on the rail main body 42 of the tray 41, and can smoothly guide the sliding operation. The position of the sliding portion 8b is not limited to the illustrated embodiment, and can be formed on an appropriate side surface and a horizontal surface of the control member 8. For example, the elastic portion 8a may be formed on the right side of the cross section of the vertical portion 42b of the rail body 42 instead of the left side (see FIG. 3). Further, the protruding shape of the elastic portion 8a is not limited to a substantially mountain shape (see FIGS. 2 and 5) when viewed from the plane, but may be a substantially mountain shape when viewed from the front. When the elastic portion 8a has a substantially mountain shape when viewed from the front, the elastic portion 8a is accommodated without being caught when the rail body 42 is accommodated in the double side wall 41A of the tray 41. The slope 8f provided in the case of a mountain shape is not necessary.

  Further, the position where the control member 8 is provided is not limited to two places on both ends in the length direction of the rail body 42 in the embodiment, for example, one place or a plurality of places in the middle portion of the rail body 42 in the length direction. Also good. In this case, the position of the elastic portion 8a with respect to the vertical portion 42b of the rail body 42 may be on either the left side or the right side, and the protruding shape of the elastic portion 8a is substantially mountain-like when viewed from the plane or substantially when viewed from the front. Any of a mountain shape may be sufficient.

  In the above embodiment, the control member 8 is formed as a separate part from the rail body 42. However, the rail body 42 and the control member 8 can be integrally formed of the same material to form a control unit. . This can be easily realized if the rail main body 42 is made of plastic, for example, and it is preferable that the control unit and the rail are formed in advance so that the assembly work can be omitted and a difference in performance due to an assembly error can be prevented. The same applies to the rail body 42 made of metal.

Each tray 41 used in the tray device 4 described above is arbitrarily selected for each tray device 4 with a tray 41 having a different depth from a shallow bottom type having a depth of about 50 mm to a deep bottom type having a depth of about 100 mm. Can be used.
The tray 41 used in each tray device 4 has a substantially constant length and width depending on the length of the base frame 5 and the length of the top plate 2. The length can be changed by adjusting and selecting the total length of the rail body 42. Incidentally, in the example of FIG. 6, when the total length of the rail body 42 is increased, the front and rear stroke length of the tray 41 is shortened by the length of the rail, and conversely, when the total length of the rail body 42 is decreased, the stroke length of the tray 41 is become longer.

  Since the tray device of the present invention is as described above, it is extremely useful as a tray device for carts.

DESCRIPTION OF SYMBOLS 1 Cart 2 Top plate 3L, 3R Left and right support | pillar 4 Tray apparatus 41 Tray 41A Double side wall 41a Inner inner wall 41b Outer inner wall 41c Outer inner wall lower end part 41d Locking piece 41e Partition wall 41f Connecting wall 42 Rail main body 42a Root part 42b Vertical portion 42c Standing side 42d Bracket screw hole 42e, 42f Notch portion 42g Control member screw hole 43 Rail mounting bracket 5 Base frame 6 Handle 7a Rail locking slot 7b Bracket screw hole 8 Control member 8a Elastic portion 8b Sliding part 8c Recessed part 8d Mounting screw 9a-9d Caster 10 Stopper

Claims (7)

  In a cart tray apparatus provided with a tray that is slidably supported via a rail between right and left support columns erected on a base frame having casters, the tray is within the left and right inner width of the support columns. A tray main body having a box shape with the upper surface of a generally rectangular shape having a left-right width that fits in the upper surface, and a double side wall that is formed with double side walls corresponding to at least the left and right columns in the main body; Rails that slidably support the tray on the side walls are vertically raised from a horizontal base portion attached to the opposing inner surfaces of the left and right struts and a width direction tip of the base portion in the front-rear direction of the base frame. A rail main body having a substantially L-shaped cross section composed of an extended vertical portion, and provided in the rail main body, is contained within the double side wall of the tray and is generated between the double side wall and the rail. Data with, and the tray device for carts, characterized in that a control unit for suppressing inadvertent operation on the rail.   The tray apparatus according to claim 1, wherein the double side wall is provided with a holding portion for holding at least a slide end of the tray in a restraint manner.   A holding part provided inside the double side wall of the tray engages with a concave part of a control part provided in the rail body, and stops the sliding of the tray by a cooperative action with the concave part and performs a restraining action. The tray device according to claim 2 formed as a piece.   The partition wall which has the substantially mountain-shaped lower end surface shape which hold | grips the upper end part of a rail main body from the both sides of the cross section of the rail main body at the time of sliding of a tray was provided in the ceiling side inside a double side wall. The tray apparatus in any one of.   The control part provided in a rail main body was provided with the elastic contact part which contact | abuts elastically with the inner surface of the double side wall of a tray, and the recessed part which engages the latching piece provided in the said double side wall. The tray apparatus in any one of -4.   The tray device according to claim 5, wherein the control unit includes a second contact portion in a horizontal posture that contacts the lower end surface of the outer side wall of the double side wall of the tray in addition to the elastic contact portion and the concave portion. The control part is provided on both sides or a central part of the rail body, and the locking piece that engages with the recess of the control part is provided corresponding to the position of the control part provided on the rail body. Tray device.

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