JPS5818749Y2 - Serving car - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a serving cart in which a plurality of trays stored in multi-tiered form can always be put in and taken out from the same part.

Conventional catering trucks used to serve in-flight meals on airplanes or to patients in hospitals support multiple trays in a multi-tiered manner, each of which can be inserted and removed from the side. It was only a small tray, so if you wanted to remove the tray from the bottom, you had to bend over and take it out.
As a result, serving food requires a great deal of effort.

In order to reduce such labor, the present invention allows multiple trays to be taken in and taken out from a fixed part that is easy to take in and out at all times, and also automatically moves the tray support piece as trays are taken out and put in. The tray is moved one stage at a time, allowing a plurality of trays to be stored in a convenient manner, and will be described below based on an embodiment shown in the accompanying drawings.

1 is a housing, 2 is a door hinged to the front of the housing, 3 is a top plate fixed horizontally to the upper part of the housing 1, and 4 is fixed horizontally to the lower part of the housing 1. This is the bottom board.

Above the upper plate 3 and below the lower plate 4 in the housing 1,
An upper chamber 5 and a lower chamber 6 are formed, and an upper plate 3 and a lower plate 4
A storage chamber 7 is formed between the two.

Note that the front surface of the upper chamber 5 and the front surface of the lower chamber 6 are closed off by a front plate (path shown).

Window holes 8 and 9, which are long in the front-rear direction, are bored in the left and right sides of the upper plate 3 and the lower plate 4, respectively.

A reversible motor 10 with a built-in brake is fixed at the center of the upper surface of the upper plate 3.

A gear 11 is mounted on the shaft 10a of the motor 10 facing in the front-rear direction.
and chain sprocket 12 are fixedly attached.

On the side of the motor 10, there is a shaft 13 parallel to the shaft 10a.
is pivotally supported by the back plate and front plate of the housing 1, and this shaft 1
3 has a gear 1 having the same diameter as the gear 11 that meshes with the gear 11.
4 and a chain sprocket 15 having the same diameter as the chain sprocket 12 are fixedly attached.

Horizontal feed shafts 16 and 17 in the front and rear directions are pivotally supported on both left and right sides of the upper chamber 5.

Chain sprockets l-18 and 19 of the same diameter are fixed to each feed shaft 16 and 17, and the chain sprockets l-18 and 19 are fixed to the left chain sprocket 18 and the chain sprocket 12 fixed to the shaft 13 of the motor 10. , the endless chain 20 is wound, and the right chain sprocket 19 and the shaft 1
An endless chain 21 is wound around the chain sprocket 15 fixed to the chain sprocket 3.

Thus, by the forward and reverse rotation of the shaft 10a of the motor 10,
Gears 11, 14, chain sprocket 12, 15, 1
8, 19, the left and right feed shafts 16.17 are always rotated in opposite directions in synchronization with each other via the endless chain 20.21.

Each feed shaft 16, 17 has four engaging claws 22, 23 projecting radially.

Reference numerals 24 and 25 denote wide belts, one end of which is fixed to a longitudinal shaft 26 and 27 fixed approximately in the center of the upper chamber 5.

This bell) 24.25 extends outward from the shaft 26.27, and is provided with an engaging pawl 2 protruding from each feed shaft 16.17.
2. After being wound around 23, it hangs down along the inner surface of the housing 1, and is inserted through the window hole 8 of the upper plate 3 and the window hole 9 of the lower plate 4.

The lower ends of the belts 24 and 25 are fixed to winding shafts 28 and 29 in the front and back direction that are pivotally supported on both left and right sides of the lower chamber 6.

The winding shafts 28 and 29 are always biased in the direction of winding up the bells 24 and 25 by a mainspring spring (path shown), etc., so that the intermediate portions of the bells 24 and 25 are always kept under tension. It is.

Vertical base pieces 30a of a plurality of mold support pieces 30 forming a front-curved shape are fixed to the inner surface of the bell) 24.25 with the same vertical spacing as the pitch of the engaging claws 22.23, and the left and right On the horizontal projecting piece 30b connected to the upper end of the base piece 30a of the mold support piece 30, trays 31 can be received in multiple stages, as shown by imaginary lines in FIG. be.

At both ends of the base piece 30a of each mold support piece 30, there are projecting pieces 30C.
is formed, and this projecting piece 30C fits into a vertical guide 32 fixed to the inner surface of the housing 1.

Guided by this guide 32, the mold support piece 30 can be smoothly raised and lowered.

The uppermost mold support piece 30 is always locked by the engaging claw 22.23, and as the feed shaft 16.17 rotates, each mold support piece 30 is rolled up one stage by the engaging claw 22.23. ,
The protruding pieces 30C of the rolled-up mold support piece 30 are placed one by one into a side U-shaped guide 32 fixed to the front and rear surfaces of the upper chamber 5 with the inner end inclined downward.
24.25 can be loosened and continuously pushed in for storage (Fig. 2), or each mold support piece 30 can be pulled out from the guide 32 one by one and lowered together with the bell) 24.25 (Fig. 1). It is possible to do so.

34 is a proximity switch for raising the belts 24, 25, which is provided at a position facing the side surface of the tray 31 at the top in the storage chamber 7, and is activated when the tray 31 in the same position is pulled out. Then, power is supplied to the motor 10, and the tray 3 of the next stage is
1 until the feed shaft reaches the same position (bell 16° 17) 2
4.25 is rotated in the direction of winding it up.

35 is a contact switch for lowering the bells 24 and 25, which is fixed to the back of the housing 1 so that it comes into contact with the rear of the tray 31 when the tray 31 at the top is pushed in. There is.

This contact switch 35 is actuated by pushing the tray 31 on the uppermost stage, and moves the feed shaft 16, 17 by the period of the bell l-
The motor 10 is driven so as to rotate the windings 24 and 25 in the unwinding direction.

Reference numeral 36 denotes a changeover switch, which is provided at an appropriate position on the side surface of the housing 1.

When the belt 25 is in the lowest position as shown in FIG.
The contact switch 35 stops operating the previously operated proximity switch in response to an upper operating plate (as shown in the diagram) made of metal foil or the like affixed to the belt 25 opposite to the contact switch 35. When the belt 25 is at its highest position as shown in FIG. The contact switch 36, which was previously activated, is deactivated in response to the lower activation plate (path shown), and the proximity switch 34 is thereafter activated.
It is designed so that only one can operate.

In addition, the main switch (illustrated path) provided in the circuit that connects the power supply (illustrated path) to the motor 10 and each switch, etc.
It is preferable to close and open the door 2 in synchronization with the opening and closing of the door 2.

Next, the operation of the device of the present invention will be explained.

First, as shown in FIG.
1 is received by each mold support piece 30 and stored in multiple stages.

At this time, the proximity switch 34 is
can be activated, but the contact switch 35 is not activated.

If you open the door from this state and take out the tray 31 on the top shelf,
The proximity switch 34 is activated, the motor 10 rotates forward, and the feed shaft 18.19 winds up the bell) 24.25.

At this time, the uppermost tray support piece 30 is pushed into the guide 33.

When the tray 31 of the next stage rises to a position facing the proximity switch 34 due to the rise of the tray 24.25, the operation of the proximity switch 34 is stopped, and the motor 10 is stopped and braked at the same time.

Next, when the tray 31 in the next stage, which is the original top stage, is taken out, each mold 31 rises by one stage due to the same operation as in the case described above. As the tray 31 rises one step at a time, the guide 33
Inside, as shown in Figure 4, there is a middle bell l-24.
, 25 are left slack, and the tray support piece 30 is continuously stored.

As shown in FIG. 2, when the lowest tray 31 reaches the uppermost position, the changeover switch 36 is activated and the proximity switch 34 is activated.
operation is stopped, and from then on only the contact switch 35 can be operated.

Therefore, even if you take out the last tray 31 in this state,
The contact switch is not activated, and the tray support piece 30 at the lowest stage remains in the same position.

Next, the recovered tray 31 is inserted into the uppermost position as shown in FIG. 2, and when the rear end of the tray 31 comes into contact with the contact switch 35, the contact switch 35 is activated.

When the contact switch 35 is actuated, the motor 10 reverses,
Left and right feed shafts 16.17 + period belt 24.25
24 and 25 are
The engaging claws 22, 23 are lowered by one pitch.

At this time, from each guide 33, ■ tray support pieces 30 are pulled out.

As a result, the second tray support piece 30 from the bottom reaches the uppermost position in the storage chamber 7 suitable for inserting the tray 31, and in this state the motor 10 is stopped and braked.

In this state, when the recovered second tray is inserted into the uppermost position in the storage chamber 7, the same operation as described above will occur.
The third tray support piece 30 from the bottom descends to the uppermost position in the storage chamber 7 and waits to store the third tray 31.

Thereafter, in the same manner, each time a tray 31 collected from the uppermost position is inserted one by one, the tray support piece 30 is lowered one step at a time.

When the lowest tray 31 inserted first reaches the lowest position shown in FIG. It becomes operational.

After that, even if the last tray 31 is inserted into the uppermost position, the contact switch 35 is not activated, so the bell) 24.
25 is no longer lowered and its tray 31 is held in position.

After that, when the tray 31 on the uppermost stage is taken out, the proximity switch 34 is activated, and the bell) 24.25 is
It begins to rise as in the previous case.

As is clear from the above, in the present invention, the storage room 7
Since all the trays 31 can be taken in and out from the topmost position inside, it is possible to carry out the distribution work while standing upright without bending down, which is extremely convenient.

In addition, in the present invention, instead of using an endless belt to raise and lower the tray 31, the structure is such that a single belt is pulled up and down. There is no drawback that a large space inside the housing is used for running the belt, and the belt can be used in contact with the inner surface of the housing, making it possible to use most of the space inside the housing for storing trays. It has the advantage that it can be used for

This is ideal for a serving vehicle used in an aircraft, which is required to be small and lightweight.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of an embodiment of the present invention with the maximum number of trays stored in the storage chamber, and Fig. 2 is a longitudinal sectional front view of the same embodiment with only one tray stored in the storage chamber. 3 is a cross-sectional plan view taken along the line X--X of FIG. 1, and FIG. 4 is a perspective view of the main parts showing a state in which a large number of tray support pieces are housed in the guide. 1... Housing, 2... Door, 3...
・Upper plate, 4...lower plate, 5...upper chamber,
6...Lower chamber, 7...Storage room, 8,9
... Window hole, 10 ... Motor, 10a.
...Axis, 11...Gear, 12...
・Chain sprocket, 13...Axis, 14・
...Gear, 15...Chain sprocket), 16.17...Feed shaft, 18.19...
... Chain sprocket 320, 21 ... Endless chain, 22.23 ... Engagement pawl, 24.2
5...Belt, 26.27...Shaft, 2
8.29... Winding shaft, 30... Tray support piece, 30a... Base piece, 30 b, 30 C
・・・Protrusion, 31・・・Bon, 32.33・
...Guide, 34 ...Proximity switch, 3
5... Contact switch, 36... Changeover switch.

Claims (1)

[Scope of utility model registration request] Inwardly protruding tray support pieces are fixed to the inner surface of the belt hanging down from both sides inside the housing at equal intervals in the vertical direction, so that the left and right tray support pieces can receive a plurality of trays in a multi-tiered manner. In addition, a plurality of engaging pawls that engage with the tray support piece are provided radially protruding from a pair of left and right feed shafts that are rotated forward and backward in opposite directions by a motor, and by rotation of the feed shaft, By continuously pushing the tray support piece into a guide fixed in the housing with the belt slack, or by pulling out the tray support piece from the guide,
A serving vehicle characterized in that the belt and the tray support piece fixed thereto can be raised and lowered one stage at a time.