JP2008183058A - Manual system tray service cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual system tray service cart which does not have its way to go down even when an operator moves his or her hand away from the cart on a ramp. <P>SOLUTION: The manual system tray service cart A is constituted by arranging fixed wheels 3 for travelling and free wheels 4 on the lower face of a vehicle body 2 accommodating trays 1 for food service. Detent wheels 5 are arranged in the side faces of the fixed wheels 3. Sending detents 7 engaging with the detents 6 of the detent wheels 5 are arranged in the vehicle body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manual barge used in hospitals, hotels, schools, and the like.

  For example, in a hospital where meals are provided to patients in each room, tableware with staple food, side meals, desserts, etc. are arranged on the tray and a large number of these trays are accommodated in the distribution car. A person pushes or pulls the vehicle to run, and while traveling around each hospital room, the tray is taken out from the barge and delivered to the patient.

Usually, the layout vehicle runs on a horizontal floor surface. In this case, even if the operator releases his / her hand from the layout vehicle, the layout vehicle stops on the spot. However, depending on the structure of the building, such as barrier-free, the arrangement car may run on an inclined floor surface. In such a case, if the worker removes his hand from the barge, the barge will go down on the slope, and if there is a person under the slope, the barge may hit this person. It is a danger. Therefore, in order to stop the layout vehicle on the slope, an operator generally locks the wheel while supporting the layout vehicle (see, for example, Patent Document 1).
No. 8-4920

  However, when an operator is running the scooter on the slope, if the hand unexpectedly slips away, for example, if the hand leaves the scooter, the scooter will fall down on the slope without locking the wheels. It will be dangerous as above.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a manual trolley that does not go down on the slope even if an operator releases his / her hand.

  The manual distribution vehicle according to claim 1 of the present invention is a manual distribution vehicle A formed by providing a traveling fixed wheel 3 and a free wheel 4 on the lower surface of a vehicle body 2 that accommodates a feeding tray 1. The claw wheel 5 is provided on the side surface of the fixed wheel 3 and the feed claw 7 that engages the claw 6 of the claw wheel 5 is provided on the vehicle body 2.

  According to a second aspect of the present invention, in the first aspect, the vehicle main body 2 is provided with a feed claw 7 that engages with the claw 6 of the claw wheel 5 when traveling on a slope and does not engage with the claw 6 of the claw wheel 5 when traveling on a horizontal surface. It is characterized by comprising.

  According to a third aspect of the present invention, in the second aspect, the claw wheels 5a and 5b are provided on both side surfaces of the fixed wheel 3 with the direction of the claw 6 reversed, and the claw wheels 5a and 5b are engaged with the claw 6 of the claw wheels 5a and 5b. The feed claws 7a and 7b are provided on the vehicle body 2 and are characterized in that

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the release means 8 for releasing the engagement of the feed claw 7 with respect to the claw wheel 5 is provided.

  According to the manual arrangement vehicle of the first aspect of the present invention, the rotation of the fixed wheel can be restricted to a certain direction by engaging the feed claw with the claw of the claw wheel, and particularly the slope. When the operator pulls up the manual trolley on the top, even if the operator releases his hand from the manual trolley, it can prevent the manual rig from going down the slope without permission. is there.

  According to the invention according to claim 2, when the slope travels, the feed pawl engages with the pawl claw, so that even if the operator releases his hand from the manual barge, the manual barbing can freely move the slope. In addition, when driving on a horizontal surface, the feed pawls do not lock onto the claws of the claw wheels, so that the rotation of the fixed wheels is not restricted, and the manual trolley can be moved forward freely.・ It can be moved backward.

  According to the invention according to claim 3, even when the manual trolley is raised backward, particularly on the slope, by providing the fixed wheel with the claw wheel having the direction of the claw reversed, It is possible to prevent a manual trolley from going down the slope without permission.

  According to the invention of claim 4, by releasing the engagement of the feed claw with the claw wheel by the release means, the rotation of the fixed wheel is not restricted, and the manual laying wheel can be freely advanced / retreated. Is.

  Embodiments of the present invention will be described below.

  FIG. 1 shows an example of an embodiment of the present invention, and this manual trolley A has a stationary wheel 3 and a free wheel 4 for traveling on the lower surface of a vehicle body 2 that accommodates a tray 1 for feeding. It is provided and formed.

  The vehicle main body 2 includes a box-shaped hot / cold refrigerator 9 that opens on both sides, an exterior panel 10 that is externally mounted on the outer surface of the hot / cold refrigerator 9 except for opening portions on both sides of the hot / cold refrigerator 9, and openings on both sides of the hot / cold refrigerator 9. It is formed with an openable / closable door 11 attached to the part. The hot / cold storage 9 is formed of a warm storage 13 and a refrigerator 14 that are partitioned by a partition plate 12 in the front-rear direction, and a plurality of tray receivers 15 are formed on the partition plate 12 in the vertical direction. Therefore, a large number of food trays 1 can be placed on each tray receiver 15 and stored in the vehicle body 2. In addition, an operation display unit 16 in which various switches and instruments for adjusting the temperature in the heating / cooling chamber 9 and the like are formed is provided at the upper part of the vehicle main body 2. A handle 17 is provided for an operator to deliver the meal.

  Freely swingable free wheels 4 (casters) are provided at the front left and right two places and the rear left and right two places on the lower surface of the vehicle body 2 so that the direction of the manual laying wheel A can be freely changed. is there. In addition, fixed wheels 3 that rotate only in the front-rear direction of the vehicle main body 2 are provided at two positions on the left and right of the center of the lower surface of the vehicle main body 2. In FIG. 1, reference numeral 38 denotes a bumper.

  As shown in FIG. 2, each fixed wheel 3 is attached to an axle 19 of a support portion 18 projecting from the lower surface of the vehicle body 2. A claw wheel 5 is fixedly provided on the side surface of each fixed wheel 3, and the claw wheel 5 rotates around the axle 19 together with the fixed wheel 3.

  As shown in FIG. 2, the claw wheel 5 is provided with a plurality of claws 6, and each claw 6 is engaged with a sliding surface 20 on which a feed claw 7 (described later) slides and a feed claw 7 is engaged. The surface 21 is formed. When the fixed wheel 3 rotates (forward rotation) in the direction in which the manual trolley A moves forward, that is, when the fixed wheel 3 rotates in the direction of the arrow in FIG. The claw wheel 5 is provided on the fixed wheel 3 so that the engagement surface 21 comes in the direction toward the rear.

  As shown in FIG. 2, the feed claw 7 is engaged with the claw 6 of the claw wheel 5, and is provided on the rotating shaft 22 of the support portion 18 projecting from the lower surface of the vehicle body 2. The rotary shaft 22 is located at the upper rear portion of the axle 19, and the feed claw 7 rotates around the rotary shaft 22. As shown in FIG. 2, the tip of the feed claw 7 is usually placed on the claw 6 of the claw wheel 5 by its own weight. Then, when the fixed wheel 3 rotates forward in the direction of the arrow in FIG. 2, after the tip of the feed claw 7 slides on the smooth surface 20 of a certain claw 6, The operation of falling on the smooth surface 20 of the next claw 6 from the boundary portion with the mating surface 21 is repeated, and the forward rotation of the fixed wheel 3 is not limited at all. On the other hand, if the fixed wheel 3 is about to rotate (reverse) in the direction in which the manual trolley A moves backward, that is, if the fixed wheel 3 is about to rotate in the direction opposite to the direction of the arrow in FIG. Since the tip of the claw 7 comes into contact with and engages with the engagement surface 21 of the claw 6 of the claw wheel 5, the fixed wheel 3 does not reverse.

  As described above, the feed claw 7 is engaged with the claw 6 of the claw wheel 5 so that the rotation of the fixed wheel 3 can be limited to a certain direction (the direction of the arrow in FIG. 2). In particular, when the operator pulls up the manual trolley A on the slope, even if the operator accidentally releases his hand from the manual trolley A, the manual trolley A goes down the slope without permission. Can be prevented.

  By the way, as shown in FIG. 3 (a), when the tip of the feed claw 7 is always placed on the claw 6 of the claw wheel 5, the manual laying wheel A can only move forward but cannot move backward. In the present invention, the release means 8 for releasing the engagement of the feed claw 7 with respect to the claw wheel 5 is provided, so that the manual trolley A can be moved forward as well as backward. The release means 8 is a means capable of arbitrarily rotating the rotary shaft 22 provided with the feed claw 7, and for example, the wire 24 is attached to the tip of the projection 23 provided on the rotary shaft 22 as shown in FIG. It can be formed by connecting one end. As shown in FIG. 3A, the protrusion 23 is provided on the rotary shaft 22 so as to be positioned above the feed claw 7 when the feed claw 7 is placed on the claw wheel 5. In the case shown in FIG. 3, the angle formed by the feed claw 7 and the projection 23 is approximately 90 °, but is not limited thereto. When the wire 24 is pulled rearward, the rotary shaft 22 rotates rearward, so that the feed claw 7 is lifted away from the claw wheel 5 as shown in FIG. It is something that can be done. As shown in FIG. 1, the other end of the wire 24 is connected to a release lever 26 provided on the handle 17 via a plurality of pulleys 25, and the operator holds the handle 17 and holds the release lever 26. When the button is pulled forward, the engagement of the feed claw 7 is released.

  FIG. 4 schematically shows another example of the release means 8, and this release means 8 is formed by connecting the movable iron core 28 of the solenoid 27 to the tip of the projection 23 provided on the rotating shaft 22. ing. The solenoid 27 is electrically connected to a control unit 29, and the control unit 29 is electrically connected to a battery 30 that supplies electric power and a switch 31 that changes a moving direction of the movable iron core 28. Then, when the switch 31 is put on the release side, the movable iron core 28 is pulled backward, and the rotation shaft 22 rotates in the rearward direction, whereby the feed claw 7 is lifted away from the claw wheel 5, The fixed wheel 3 can be reversed. When the switch 31 is inserted to the lock side, the movable iron core 28 is pushed forward as shown in FIG. 4, and the rotary shaft 22 rotates in the forward direction along with this, so that the feed claw 7 moves to the claw wheel 5. Since it is elastically contacted, the reverse rotation of the fixed wheel 3 is limited.

  FIG. 5 schematically shows still another example of the release means 8, and this release means 8 is formed as follows. That is, one end of the link bar 32 is pivotally attached to the tip of the projection 23 provided on the rotary shaft 22, and the other end of the link bar 32 is fixed to the rotary shaft 34 of the motor 33. It is pivotally attached to the tip. The motor 33 is electrically connected to the control unit 29, and the control unit 29 is electrically connected to the battery 30 that supplies electric power and the switch 31 that changes the rotating direction of the rotating arm 35. When the switch 31 is inserted to the release side, the rotary arm 35 rotates in the rearward direction and the link bar 32 is pulled rearward. As a result, the rotary shaft 22 rotates in the rearward direction. Is lifted away from the claw wheel 5 so that the fixed wheel 3 can be reversed. When the switch 31 is inserted to the lock side, the rotating arm 35 rotates in the forward direction as shown in FIG. 5 and the link bar 32 is pushed forward, and accordingly the rotating shaft 22 rotates in the forward direction. As a result, the feed claw 7 is brought into elastic contact with the claw wheel 5, so that the reverse rotation of the fixed wheel 3 is limited.

  As described above, any of the release means 8 can be used to release the engagement of the feed claw 7 with respect to the claw wheel 5, whereby the rotation of the fixed wheel 3 is not limited thereby, and the manual type allocation wheel A can move forward and backward freely.

  FIG. 6 shows another example of the embodiment of the present invention. The vehicle main body 2 of the manual trolley A is engaged with the claw 6 of the claw wheel 5 when traveling on a slope, and claw when traveling on a horizontal plane. A feed claw 7 that is not engaged with the claw 6 of the vehicle 5 is provided. Specifically, the feed claw 7 is formed by providing a counterweight 36 (balance weight) on the opposite side of the rotary shaft 22 from the feed claw 7, and the feed claw 7 is fixed by the counterweight 36. The position is maintained (horizontal in FIG. 6A). Therefore, when the manual trolley A is on the horizontal plane, the feed claw 7 is separated from the claw wheel 5 by the counterweight 36 as shown in FIG. It can be reversed. Further, when the manual allocation vehicle A goes up on the slope, the claw wheel 5 comes close to and engages with the feed claw 7 as shown in FIG. Inversion is not limited, but inversion is limited. Further, when the manual trolley A is moved backward on the slope, the engagement of the feed claw 7 may be released as shown in FIG. In the case shown in FIG. 6, when the release means 8 is not used, the feed claw 7 is held horizontally by the counterweight 36, but manually as shown in FIG. 6 (a). Since the feed claw 7 does not have to be in contact with the claw wheel 5 when the type wheel arrangement A travels on a horizontal plane, the feed claw 7 may be slightly inclined up and down due to the weight of the counterweight 36.

  As described above, in the manual trolley A provided with the fixed wheel 3 shown in FIG. 6, the feed claw 7 is engaged with the claw 6 of the claw wheel 5 when traveling on the slope as shown in FIG. 6B. Thus, even if the operator releases his hand from the manual trolley A, it is possible to prevent the manual trolley A from going down the slope without permission, as shown in FIG. 6 (a). In addition, the feed claw 7 is not locked to the claw 6 of the claw wheel 5 when traveling on a horizontal plane, so that the rotation of the fixed wheel 3 is not restricted, and the manual trolley A can be moved forward and backward freely.

  By the way, the operator normally grabs the handle 17 and pulls the manual laying wheel A to travel, but is forced to push the manual laying wheel A in a place where the direction cannot be changed. In such a case, when the manual trolley A provided with the fixed wheels 3 shown in FIG. 6 is pushed up on the slope, the feed claw 7 is moved by the counterweight 36 with the counterweight 5 as shown in FIG. Therefore, the fixed wheel 3 is freely rotated forward / reversely. Therefore, at this time, if the operator's hand slips unexpectedly or the like and moves away from the manual arrangement vehicle A, the manual arrangement vehicle A may collide with the operator.

  Therefore, FIG. 7 shows that such a problem can be solved. FIG. 7 shows another example of the embodiment of the present invention. In this manual layout vehicle A, the claw wheels 5a and 5b are arranged with the direction of the claw 6 reversed on both side surfaces of the fixed wheel 3. Are fixedly provided, and feed claws 7a and 7b that engage with the claws 6 of the respective claw wheels 5a and 5b are provided on the vehicle body 2. That is, the claw wheel 5b and the feed claw 7b are further added to the one shown in FIG. 6, but the added claw wheel 5b is located between the fixed wheel 3 and the support portion 18, together with the fixed wheel 3. It rotates around the axle 19. Since the directions of the claws 6 of the claw wheels 5a and 5b on both sides of the fixed wheel 3 are opposite to each other, when the fixed wheel 3 rotates (normally rotates) in the direction in which the manual trolley A moves forward, that is, FIG. When the fixed wheel 3 rotates in the direction of the arrow (a), in the outer claw wheel 5a, the sliding surface 20 comes first and the engaging surface 21 comes after each claw 6. However, in the inner claw wheel 5b, the engaging surface 21 of each claw 6 comes first and the smooth surface 20 comes after.

  The feed claw 7a that engages with the claw 6 of the outer claw wheel 5a is provided in the same manner as in FIG. The rotary shaft 37 is provided at the upper front portion. The feed claw 7b also rotates around the rotation shaft 37, and a counterweight 36 (balance weight) is provided on the opposite side of the rotation shaft 37 from the feed claw 7b. Both feed claws 7a and 7b are held at a fixed position (horizontal in FIG. 7A) by two counterweights 36. Therefore, when the manual trolley A is on the horizontal plane, as shown in FIG. 7 (a), the feed pawls 7a and 7b are separated from the pawls 5a and 5b by the counterweights 36. The wheel 3 can freely rotate forward and backward. When the manual trolley A is pulled up on the slope, the inner feed claw 7b is separated from the inner claw wheel 5b as shown in FIG. Since 5a comes close to and engages with the outer feed claw 7a, the rotation of the fixed wheel 3 in the direction of the arrow in FIG. 7B is not limited, but the reverse rotation is limited. Is. At this time, when the manual trolley A is moved backward, the above-described releasing means 8 may be used to release the engagement of the outer feed claws 7a as shown in FIG. On the other hand, when the manual trolley A is pushed up on the slope, the outer feed claw 7a is separated from the outer claw wheel 5a as shown in FIG. Since the vehicle 5b comes close to and engages with the inner feed claw 7b, the rotation of the fixed wheel 3 in the direction of the arrow in FIG. 7D is not limited, but the rotation opposite to this is limited. It is what is done. At this time, even when the manual trolley A is moved backward, the release means 8 described above may be used to release the engagement of the inner feed claw 7b as shown in FIG.

  Thus, in the manual trolley A provided with the fixed wheels 3 shown in FIG. 7, the claw wheels 5 a and 5 b with the directions of the claws 6 reversed are provided on each fixed wheel 3. As shown in FIG. 7 (b), not only is the manual arrangement vehicle A pulled up on the slope, but also the manual arrangement vehicle A is pushed as shown in FIG. 7 (d) to rise backward on the slope. Even if it is a case where it makes it, it can prevent that the manual type allocation vehicle A goes down the slope without permission.

It is a side view which shows an example of a manual type allocation vehicle. It is a side view which shows the fixed wheel of a manual type allocation vehicle. (A) (b) is a side view which shows the fixed wheel of a manual type allocation vehicle. It is a schematic diagram which shows another example of the cancellation | release means of a manual type allocation vehicle. It is a schematic diagram which shows another example of the cancellation | release means of a manual type allocation vehicle. (A)-(d) is a side view which shows the fixed wheel of another example of a manual type allocation vehicle. (A)-(e) is a side view which shows the fixed wheel of another example of a manual type allocation vehicle.

Explanation of symbols

A manual arrangement wheel 1 tray 2 vehicle body 3 fixed wheel 4 free wheel 5 claw wheel 5a claw wheel 5b claw wheel 6 claw 7 feed claw 7a feed claw 7b feed claw 8 release means

Claims (4)

  In a manual trolley that is formed by providing a fixed wheel and a free wheel for traveling on the lower surface of the vehicle main body that houses the tray for feeding, a claw wheel is provided on the side of the fixed wheel and engaged with the claw of the claw wheel. A manual laying wheel characterized in that a feed claw is provided on the vehicle body.   2. The manual trolley according to claim 1, wherein a feed pawl is provided on the vehicle main body so as to engage with a claw of a claw wheel when traveling on a slope and not engaged with a claw of the claw wheel when traveling on a horizontal surface.   3. The manual type according to claim 2, wherein a claw wheel is provided on both side surfaces of the fixed wheel with the direction of the claw reversed, and a feed claw that engages with the claw of each claw wheel is provided on the vehicle body. Serving car.   4. A manual trolley according to claim 1, further comprising release means for releasing the engagement of the feed claw with the claw wheel.

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