JP2015092952A - Tray-equipped cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nurse cart excellent in silence without looseness of trays in movement or the like, and easy in attachment/detachment of the trays.SOLUTION: A tray 8 is supported by U-shaped brackets 7 each attached to a strut of a cart body. Each of right and left side parts of the tray 8 has a double structure having an oblong groove 15, and oblong outer walls 19 are placed on lower part inward projection pieces 27 of the brackets 7 and slide. The bracket 7 is made of a resin, the lower part inward projection piece 27 is formed with front and rear stoppers 37, 35 and an auxiliary stopper 36, and an upper part inward projection piece 26 of the bracket 7 is integrally formed with spring bodies 38, 39. The tray 8 is not shaken during a travel or the like nor advanced by momentum because the tray 8 is pressed by the spring bodies 38, 39 in a state that the tray 8 is fitted in the brackets 7.

Description

  The present invention relates to a cart with a tray such as a nurse skirt (or nurse wagon) used in a medical institution, for example.

  As a kind of movable cart equipped with casters, there is a top plate with trays arranged in multiple stages between right and left columns, and it is widely used in medical institutions such as hospitals called nurse skirts. The tray is supported by front and rear longitudinal brackets attached to the inner surfaces of the left and right columns, and the one described in Patent Document 1 has a bracket formed in a U shape in front view and flanges provided on the left and right upper edges of the tray. The tray is allowed to move back and forth by fitting into the bracket, and an upward projection is provided at the front end of the lower piece of the bracket, and the tray can be pulled out by lifting the tray over the projection.

JP 2009-17773 A

  Now, the cart is moved and used. However, if the flange of the tray is only fitted to the bracket as in Patent Document 1, the tray may be displaced due to vibration caused by the movement, which may cause rattling and noise. . Also, the tray may jump out when the tray moves forward due to the inertial force when the cart stops, or when the cart tilts due to getting on and off the elevator.

  In addition, although taking in and out of the article is performed with the tray pulled out, there is a concern that the tray may move in the pushing direction when the hand touches the tray or when the article touches the tray.

  The present invention has been made to improve the current situation.

  The present invention includes various configurations, which are specified in the respective claims. Of these, the invention of claim 1 comprises a movable cart body having left and right columns, and a tray disposed between the left and right columns, and upper and lower inwardly extending pieces are provided on the left and right columns. A bracket having a substantially U-shape in front view and fitted with the tray so as to be movable back and forth is provided, and a spring body that elastically pushes the tray is provided on an upper portion or a side portion of the bracket.

  The invention of claim 2 embodies claim 1; first, the left and right side portions of the tray have a double structure having longitudinal longitudinal grooves opened downward, sandwiching the longitudinal grooves. The outer portion is supported by the lower inwardly projecting piece of the bracket, and the spring body hits the portion located on the upper bottom of the longitudinal groove from above.

  Further, the front stopper and the rear stopper for restricting the back-and-forth movement stroke of the tray by the rear corner edge of the tray hitting the portion located in the vertically long groove of the tray of the lower inward projecting piece in the bracket, An auxiliary stopper that prevents the tray from moving forward in a state where the tray is almost fully pushed in is protruded upward, and the front stopper and the auxiliary stopper are opposed to the spring body and the front corner edge of the tray. By moving the up, the height of the front corner of the tray can be overcome.

  According to a third aspect of the present invention, the bracket is made of resin, and the spring is adapted to contact the upper inward projecting piece of the bracket against the upper surface of the side portion of the tray. The body is integrated.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the spring body extends in a cantilever shape from the front side toward the rear side on the upper inwardly extending piece of the bracket. It is formed so as to extend like a cantilever from the back to the front, and the free end of the spring body is curved downward and convex in a side view.

  In the present invention, the tray is guided by the bracket so as to be movable back and forth. However, since the tray is pushed downward or inward by a spring body provided on the bracket, rattling occurs or noise is generated when the cart is moved. This can prevent problems such as the tray that has been ejected popping out. In addition, the tray is held in a state where the tray is pulled out to an arbitrary position, so that it can be prevented from shifting even if a person's hand touches it slightly or a light object hits it. Articles can be easily put in and out in the state.

  According to the configuration of the second aspect, the tray can be held in the pushed-in state with the rear stopper and the auxiliary stopper while allowing the tray to move back and forth, so that the tray can be more reliably prevented from jumping out due to vibration or inclination due to movement. . In addition, the front and rear stoppers are hidden in the groove of the tray, so it has excellent aesthetics.

  In Claims 1 and 2, the bracket can be made of sheet metal, for example. However, if the bracket is made of resin and the spring body is integrally provided as in Claim 3, the labor is reduced and the cost is reduced. be able to. Further, since the spring body is also made of resin, it is possible to prevent a rubbing sound from being generated when the tray moves back and forth.

  Although the form of the spring body can be embodied in various ways, if a cantilever-like form oriented in the front-rear direction as in claim 4 is adopted, even if the spring body is integrally molded as in claim 3 Since the spring body can be greatly deformed in the vertical direction, even if the stopper is at a certain height, it is possible to overcome and pull out the tray without any trouble. Therefore, it is possible to easily move back and forth and attach and detach while ensuring the function of holding in the pushed-in state. Further, in claim 4, since the free end of the spring body is rounded, there is an advantage that the tray can be smoothly moved back and forth.

It is the perspective view which looked at the cart which concerns on embodiment from the front upper direction. It is the perspective view similarly seen from the back. (A) is a separated perspective view, (B) is a perspective view of the bracket as seen from the back. It is a perspective view which shows the relationship between a bracket and a support | pillar. (A) is the isolation | separation perspective view of a tray and a bracket, (B) is a vertical front view of a side part, and is VB-VB sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. It is sectional drawing in the same position as FIG. 6 in the state which pulled out the tray back.

(1). Outline of Cart Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a nurse skirt used in a medical institution. This nurse skirt has a substantially H shape in a plan view and is provided with casters 1 on the front, rear, left and right, and a portion near the rear end of the base 2. It has a left and right support column 3 erected, an elevating rod 4 mounted on the support column 3 so as to be movable up and down, and a top plate 6 fixed to the upper end of the elevating rod 4 via a support 5. The base 2 and the column 3 are main members of the cart body.

  The front and rear longitudinal brackets 7 are attached to the inner side surfaces of the left and right support columns 4, and the tray 8 is attached to each pair of brackets 7 so as to be movable back and forth. The illustrated tray 8 is a shallow type, and when a deep bottom type tray 8 is used, the number of stages that can be arranged may be reduced. Further, the mounting height of the bracket 7 can be adjusted in stages.

  The column 3 is erected on a portion of the base 2 where the horizontally long members are connected, and as shown in FIG. 3A, a substantially flat metal plate facing the tray arrangement space. The inner plate 9 and the channel-shaped metal plate outer plate 10 fixed to the inner plate 9 are the main members, and thus have a hollow structure. The elevating rod 4 uses a gas cylinder, and as shown in FIG. 3A, a holding cylinder 11 into which a fixed cylinder of the gas cylinder is fitted is fixed to the inner plate 9.

  A handle 12 is provided at the rear end of the top plate 6 to be grasped by hand when pushing and pulling. The metal fitting 5 fixed to the upper end of the lifting rod 4 on the right side as viewed from the user holding the handle 12 is provided with a lever 13 for releasing the lock of the gas cylinder. Further, a frame member 14 is provided at the front end portion of the top plate 6 to prevent the placed article from falling off.

(2). Bracket and Tray Next, the structure of the bracket 7 and the tray 8 will be described. The tray 8 is made of resin and opens upward. As shown in FIG. 5A, the tray 8 has a vertically long groove 15 with a downward opening located on the left and right sides and a longitudinally long groove 15 on the four sides. The horizontally long grooves 16 that are downwardly opened and that are long in the left-right direction are formed in communication with each other. For this reason, the front part and the rear part of the tray 8 have a double structure of the horizontally long outer wall 17 and the horizontally long inner wall 18, and the left and right side parts of the tray 8 have a double structure of the vertically long outer wall 19 and the vertically long inner wall 20. ing.

  The inner and outer walls 17, 18, 19, 20 in the tray 8 are connected by a number of first ribs 21 in a posture that crosses the long grooves 15, 16. The first rib 21 is connected by a second rib 22 extending in the longitudinal direction of the long grooves 15 and 16. The outer peripheral portion of the tray 8 has a U-shaped downward opening by inner and outer walls 17 to 20, and the inner and outer walls 17 to 20 are connected via a vertically long upper bottom portion 23 and a horizontally long upper bottom portion 24 that constitute an upper end edge. Yes. Some trays 8 have different depths. In the deep type, the inner walls 18 and 20 protrude below the outer walls 17 and 19.

  The bracket 7 is made of resin, and protrudes inward from the lower side of the side plate 25, a side plate 25 that overlaps the inner plate 9 of the support column 3, a substantially horizontal upper inward projecting piece 26 that protrudes inward from the upper end thereof. Accordingly, the bracket 7 has a substantially U-shaped configuration. For example, as clearly shown in FIG. 2, the bracket 7 protrudes from the support column 3 almost only to the near side. Of course, the bracket 7 may be disposed so as to protrude from both the front and rear sides of the column 3.

  As shown in FIGS. 3 and 4, the rear portion of the bracket 7 is fixed to the inner plate 9 of the support column 3 with two upper and lower screws 28. In this case, a slit-like longitudinal longitudinal positioning hole 30 is formed in the inner plate 9 between the upper and lower tap holes 29, while the bracket 7 has a positioning projection 31 that fits in the positioning hole 29 outward. It protrudes to. A large number of sets of tap holes 29 and positioning holes 31 are provided in upper and lower stages. For this reason, the height of the bracket 7 can be changed in any number of steps according to the depth of the tray 8 or the like.

  As shown in FIG. 4, the inner plate 9 of the support column 3 has an inwardly convex shape, while a flat portion 25 a that overlaps the inner plate 9 is formed on the outer surface of the side plate 25 in the bracket 7. The rear end of the flat portion 31 is a step portion 25b, and the bracket 7 is held in a stable posture without backlash even when the step portion 25b and the inner plate 9 overlap each other. For example, as shown in FIG. 3B, the side plate 25 of the bracket 7 is provided with a boss portion 32 into which the head of the screw 28 fits inwardly.

  For example, as can be understood from FIG. 4, the portion of the bracket 7 on the near side of the flat portion 25 a that overlaps the support column 3 is slightly inward from the inner side surface of the support column 3. Therefore, a portion of the side plate 25 at the front end of the flat portion 25a is slightly stepped in plan view.

  For example, as shown in FIG. 3B and FIG. 5B, front and rear longitudinal auxiliary sliders 33 that restrict the left and right positions of the tray 8 are provided laterally on the inner surface of the side plate 25 in the bracket 7. The lower inward projecting piece 27 of the bracket 7 has substantially the same length as the side plate 25, and the lower end edge of the vertically long outer wall 19 of the tray 8 is the root of the lower inward projecting piece 27 as shown in FIG. It is designed to be slidable on the close part.

  The vertical distance between the vertically long inner wall 25 of the bracket 7 and the lower inwardly projecting piece 27 is a dimension that is somewhat larger than the height of the vertically long outer wall 19 of the tray 8. It can move up and down by some dimension inside.

  For example, as shown in FIG. 3 (B), the rear corner edge 34a located at the rear end of the vertically long groove 15 in the tray 8 hits the rear end portion of the lower inward projecting piece 27 in the bracket 7. A rear stopper 35 that restricts the retracting position (advance position) and an upward auxiliary stopper 36 that is positioned slightly in front of the rear stopper 35 are provided. As shown in FIG. 5, when the rear corner edge 34a of the tray 8 hits the rear stopper 35 from the front, the backward movement of the tray 8 that has been advanced is restricted.

  Of the lower inwardly projecting piece 27 in the bracket 7, an auxiliary stopper 36 protrudes upward at a location immediately before the rear stopper 35, and a front stopper 37 protrudes upward at a portion near the front end. A front stopper 37 protrudes upward at a portion near the front end. The front stopper 37 and the auxiliary stopper 36 are provided in a portion exposed to the vertically long groove 15 of the tray 8.

  For this reason, when the rear corner edge 34a of the tray 8 hits the auxiliary stopper 36 from the rear side, the advanced tray 8 is restricted from jumping forward, and as shown in FIG. 7, the front corner edge 34b of the tray 8 is By hitting the front stopper 37 from the front, the rearward pull-out limit position of the tray 8 is regulated. In order to ensure the prevention of the tray 8 from popping out, the rear surface of the auxiliary stopper 36 is in a substantially vertical posture.

  When the front corner edge 34b of the tray 8 gets over the front stopper 37, the tray 8 can be attached and detached. For this reason, the front stopper 37 has a mountain-like shape in a side view in which the front and rear surfaces are inclined so that the front corner edge 34b can be easily climbed over. Further, the front corner edge 34 b of the tray 8 moves over the auxiliary stopper 36 and moves backward, so that the tray 8 can be removed from the bracket 7 backward. Therefore, in order to facilitate the backward riding of the front corner edge 34b, the front surface of the auxiliary stopper 36 is an inclined surface.

  The front and rear spring bodies 38 and 39 that elastically contact the vertically long upper bottom 23 of the tray 8 are integrally provided on the upper inwardly projecting piece 26 of the bracket 7. As clearly shown in FIG. 6, the front spring body 38 is positioned in front of the front stopper 37, and the rear spring body 39 is disposed approximately in the middle between the front stopper 37 and the auxiliary stopper 36. .

  In addition, the front spring body 38 has a longitudinal longitudinal shape in which the rear end is a free end, has a cantilever shape extending obliquely downward toward the rear, and the free end (rear end) is Curved downward and convex in side view. On the other hand, the rear spring body 39 has a longitudinal longitudinal shape in which the front end is a free end, has a cantilever shape extending downward toward the front, and the free end (rear end) is seen in a side view. Curved downward convex. Since the free ends of the spring bodies 38 and 39 are curved downward and convex, when the tray 8 is moved back and forth, the spring bodies 38 and 39 smoothly come into contact with the spring bodies 38 and 39 and the deformation is smooth.

  A restricting rib 40 protruding below the free ends of the spring bodies 38 and 39 is provided immediately behind the front spring body 38 and immediately before the rear spring body 39. These regulating ribs 40 prevent the strings and the like protruding outside the tray 8 from being caught by the spring bodies 38 and 39 when the tray 8 is removed from the bracket 7 or when the removed tray 8 is attached to the bracket 7. It is for preventing.

  For example, as shown in FIG. 3B, the rear portion of the upper inward projecting piece 26 in the bracket 7 is cut obliquely so as to be exposed above the auxiliary stopper 36 (the cutout portion is indicated by reference numeral 41). ). As can be understood from FIG. 6, the rear end portion of the upper projecting piece 26 forming the notch 41 is slightly lower.

(3) Summary / Others In the above configuration, when the tray 8 is fully pushed, the rear corner edge 34a of the tray 8 is located between the rear stopper 35 and the auxiliary stopper 36 as described above. Thus, even if the cart vibrates or tilts forward, the tray 8 does not move forward greatly. Further, in the pushed-in state, the tray 8 is pressed from above by the front and rear spring bodies 38 and 39, so that it does not vibrate when the cart is moved, and hence no noise such as rattling is generated and the silence is excellent. ing.

  For example, as shown in FIG. 6, the front and rear length of the tray 8 is larger than the front and rear length of the bracket 7, and the tray 8 is overhanging in front of the bracket 7 in a state where it is pushed all the way to the front side. Therefore, the rear end of the tray 8 is shifted to the near side from the rear end of the top plate 2. This is to prevent the tray 8 from interfering with the user's foot when the cart is used as a desk.

  When a certain amount of force is applied to the pushed tray 8 and pulled backward, the rear corner edge 34a climbs over the rear stopper 35 against the spring bodies 38 and 39, whereby the tray 8 can be pulled back. In order to make it easy to get over the rear corner edge 34a, the front surface of the rear stopper 45 is inclined forward (when the tray 8 is pulled out, a fingertip is put on the rear edge of the tray 8 to slightly lift it) Therefore, it can be said that the tray 8 can be easily pulled out without tilting the front surface of the rear stopper 45.)

  As described above, the retracted position when the tray 8 is moved back and forth is regulated by the front corner edge 34b of the tray 8 hitting the front stopper 37 as shown in FIG. Only the rear spring body 39 is in contact with the tray 8 in the fully retracted state. When the rear end of the tray 8 is pushed downward as indicated by a black arrow in FIG. 7, the tray 8 resists the rear spring body 38 with the rear end edge of the lower inwardly projecting piece 27 in the bracket 7 as a fulcrum. As a result of the rotation, the front end of the tray 8 rises as shown by the white arrow in FIG. Therefore, the tray 8 can be pulled out with almost no resistance by pulling backward with the rear end pushed downward.

  When the tray 8 is attached to the bracket 7, the tray 8 may be inserted into the bracket 7 and pushed in an inclined posture with the front slightly down. In this case, since the rear end portion of the upper inwardly projecting piece 26 in the bracket 7 is notched, the tray 8 moves from the state in which the front corner edge 34b is positioned in front of the rear stopper 35 and the auxiliary stopper 36 to the bracket 7. Can be fitted. For this reason, the tray 8 can be mounted smoothly with almost no force.

  In the process of setting the bracket 7 and pushing forward, the tray 8 first hits the rear spring body 39, then the front corner edge 34b gets over the front stopper 37, then the tray 8 hits the front spring body 38, and finally, The rear corner edge 34a gets over the rear stopper 35. In a state where the front and rear spring bodies 38 and 39 are in contact with the tray 8, the tray 8 has a stable posture in which the left and right vertical outer walls 19 are placed on the lower inwardly projecting piece 27 of the bracket 7 in a wide range. The overcoming is also done smoothly.

  The spring bodies 38 and 39 are greatly elastically deformed when the tray 8 is moved back and forth and attached / detached. However, since both the spring bodies 38 and 39 are in a cantilever state, the distance from the upper inwardly projecting piece 26 of the tray 8 is increased. While making it as small as possible, the amount of deformation can be increased. For this reason, it is possible to ensure the forward / backward movement and the attachment / detachment function of the tray 8 while being compact.

  Further, since the spring bodies 38 and 39 extend in the front-rear direction, a sufficient length for elastic deformation can be ensured. For this reason, it is excellent also in durability. Further, since the tip is curved, the tray 8 smoothly slides without causing a sticking phenomenon when the tray 8 is pushed in or pulled out.

  When the front and rear spring bodies 38 and 39 are provided as in the embodiment, there is an advantage that the stability in the pushed-in state can be increased and the rattling can be accurately prevented.

  In the illustrated embodiment, the spring bodies 38 and 39 are provided on the upper inwardly extending piece 26, but the spring bodies may be provided only on the side plate 25 or on both the side plate 25 and the upper inwardly extending piece 26. It is also possible to manufacture the spring bodies 38 and 39 as separate members using a leaf spring or the like and fix them to the bracket 7. The spring body can be provided only at one place in the front-rear direction or at a plurality of places including three or more places.

  In the embodiment, the bracket 7 is fixed to the column 3 with the screw 28, but the bracket 7 may be attached by hooking an engaging means such as a claw on the fixed column. Needless to say, the present invention can also be applied to a cart whose top plate is not liftable.

  The present invention can be actually applied to a cart such as a skirt. Therefore, it has industrial applicability.

2 Base that constitutes the cart body 3 Pillar that constitutes the cart body 4 Lifting rod 6 Top plate 7 Bracket 8 Tray 9 Inner plate of the pillar 15 Longitudinal groove 19 Longitudinal outer wall 20 Longitudinal inner wall 23 Longitudinal upper bottom portion 25 Side plate of bracket 26 Upper portion of bracket Inwardly projecting piece 27 Lower inwardly projecting piece of bracket 34 Rear corner edge of tray 35 Back stopper 36 Auxiliary stopper 37 Front stopper 38 Front spring body 39 Rear spring body

Claims (4)

A movable cart body having left and right support columns and a tray disposed between the left and right support columns are provided, and the left and right support columns are substantially U-shaped in a front view having upper and lower inwardly extending pieces. Is provided with a bracket that can be moved back and forth, and a spring body that elastically presses the tray is provided on an upper portion or a side portion of the bracket.
Cart with tray. The left and right side portions of the tray have a double structure having longitudinally long longitudinal grooves that open downward, and the outer portion is supported by the lower inwardly projecting piece of the bracket across the longitudinal groove, On the other hand, the spring body comes into contact with the portion located on the upper bottom of the longitudinal groove from above,
A front stopper and a rear stopper for restricting the forward / backward movement stroke of the tray by a rear corner edge of the tray hitting a portion of the lower inwardly projecting piece of the bracket located in the longitudinal groove of the tray, and the tray An auxiliary stopper is provided to project upwards to prevent it from moving forward when it is almost fully pushed in. The front stopper and the auxiliary stopper face the front corner edge of the tray upward against the spring body. By moving it, the height of the front corner of the tray can get over,
The cart with a tray according to claim 1. The bracket is made of resin, and the spring body is integrally provided on the upper inwardly projecting piece of the bracket so as to contact the upper surface of the side of the tray.
The cart with a tray according to claim 1 or 2. The spring body is formed on the upper inwardly projecting piece of the bracket so as to extend in a cantilever shape from the front to the back or in a cantilever shape from the back to the front, and the spring The free end of the body is curved downward and convex in side view,
The cart with a tray according to any one of claims 1 to 3.

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