JP2003193777A - Shutter locking structure for transport truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide shutter locking structure for a transport truck not allowing a third person to easily open a shutter. <P>SOLUTION: In this shutter locking structure L for the transport truck C1 movably constituted by providing casters 300 at a bottom face (a bottom plate 201) of a box-shaped storage chamber 200 provided with two or more stages of shelf boards 400, and having an opening part 500 and a shutter S1 for closing the opening part in an openable/closable manner, the shutter is provided with at least a covering member (a screen 4) windable upward, and an operating member (an operating bar 1) mounted over the cross direction of the lower end part of the covering member. The operating member is provided with a hook member 10 rotatably mounted, with the tip exposable from the lower face of the operating member, and a key operating part 30 for rotating the hook member. A locking part (a locking bar 21) engaged with the hook member rotated by the operation of the key operating part is provided at a prescribed part of the bottom plate of the storage chamber on which the lower face of the operating member abuts when the operating member is lowered. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an opening and a shutter for closing the opening so that the opening can be opened and closed, and a caster is provided on the bottom surface of a box-shaped storage provided with a plurality of shelves so as to be movable. The present invention relates to a locking structure for the shutter in the configured carriage.

[0002]

2. Description of the Related Art Conventionally, in a hospital, a food factory, a kitchen or the like, a carrier truck for accommodating and transporting foodstuffs, dishes and the like in a storage box having a multistage shelf has been used. As shown in FIG. 5, the conventional transport cart C2 has a box-shaped storage 200.
The caster 300 for rolling is provided in the lower part of the. The storage case 200 has a rectangular bottom plate portion 201 in which the casters 300 are arranged at the four corners of the bottom surface, and four columns 202 that are erected at the four corners of the top surface of the bottom plate portion 201.
Top plate portion 20 that engages with the upper ends of the columns 202 and closes the upper portion
3 and 3. In the figure, reference numeral 204 is
It is a towing handle that is fixedly installed between the columns 201 on the side of the storage case 200.

In the storage case 200, there are provided a plurality of shelves 400 on which the objects A such as trays on which foods, dishes and the like are placed are placed. Placement A on this shelf 400
For loading and unloading of the storage container 200, an opening 500 on the front side (the side shown in FIG. 5) and an opening on the back side (not shown) of the storage case 200
Be done from.

By the way, in the conventional transportation cart, since the opening portion 500 is always open, there is a possibility that the load A such as food may be dusted. In order to prevent this, a type having a shutter S2 that opens and closes the opening 500 as shown in FIG. 5 has been developed.

In the example shown in FIG. 5, the shutter S2 has a structure similar to a so-called roll blind provided near a window, and the sheet-like cover member 100 that can be wound upward and the cover member 100 are provided. An operation bar 101 attached across the width direction of the lower end portion, and a cover member 100.
And a take-up mechanism 102. Operation bar 10
Both ends of 1 are slidably engaged with rail grooves (not shown in the figure) formed along the longitudinal direction inside the column 202. In the figure, reference numeral 101a is a handle for raising and lowering the operation bar 101 with a hand. Also, reference numeral 10
1b is a magnet incorporated below the operation bar 101,
When the operation bar 101 is lowered until it comes into contact with the upper surface of the bottom plate 201 of the storage case 200, the operation bar 101 is detachably locked by the magnetic force of the magnet 101b.

[0006]

However, in the conventional carriage C2, as described above, when the shutter S2 is lowered, the operation bar 101 is moved by the magnetic force of the magnet 101b.
The third person could easily open the shutter S2 because it was only locked by. Therefore, for example, when the transporting cart C2 is used in a hospital or the like, there is a possibility that the food or the like inside may be stolen or contaminated. The present invention has been devised to solve the above problems, and an object of the present invention is to provide a locking structure for a shutter of a carriage for which a third person cannot easily open the shutter.

[0007]

In order to achieve the above object, the lock structure for a shutter of a carrier truck according to the present invention has an opening (500) and a shutter (S1) for closing the opening so that the opening can be opened and closed. And a shutter for a transporting carriage (C1) configured to be movable by providing casters (300) on the bottom surface (bottom plate 201) of a box-shaped storage (200) having a plurality of shelves (400). Locking structure (L)
The shutter includes at least a cover member (screen 4) that can be wound upward, and an operation member (operation bar 1) attached across the width direction of the lower end of the cover member. The member is provided with a hook member (10) whose rotatably attached tip can be exposed from the lower surface of the operation member, and a key operation unit (30) for rotating the hook member. A lock part (lock bar 21) that engages with the hook member rotated by the operation of the key operation part at a predetermined portion of the bottom plate of the storage with which the lower surface of the operation member abuts when the lower part is lowered. Was set up. As a result, a third person cannot easily open the shutter, and it is possible to avoid the situation where the placed object in the storage is stolen or contaminated, and the cleanliness of food etc. as the placed object. Can be held.

The key operation section is a key cylinder rotatably mounted inside the operation member,
The hook member may be fixed to the key cylinder. As a result, it is possible to prevent an outsider from opening the shutter without permission, because only a specific person owns the key that fits the key cylinder.
Further, the lock portion may be composed of a groove portion into which the hook member to be rotated can be inserted, and a lock bar which is horizontally provided in the groove portion and engages with the hook member.
As a result, the locking can be reliably performed with a simple and inexpensive structure. Further, a magnet may be arranged at a lower end portion of the operation member, at a lower end portion of the operation member, at a portion facing the bottom plate of the storage when the operation member is lowered. Accordingly, the operation member is first locked to the bottom plate of the storage by the magnetic force of the magnet, and the key operation unit can be operated in that state to easily lock the operation member.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a carriage S1 according to the present embodiment, FIG. 2 is a front sectional view and a side sectional view of a shutter locking structure L, and FIG. 3 is an explanatory diagram showing an operation of the shutter locking structure L. 4 is a perspective view showing the operation of the locking structure L of the shutter. As shown in FIG. 1, the carriage C1 has a configuration in which a rolling caster 300 is provided below a box-shaped storage case 200.

The storage case 200 has a rectangular bottom plate portion 201 in which the casters 300 are arranged at the four corners of the bottom surface, and four support columns 202 standing upright at the four corners of the top surface of the bottom plate portion 201.
And a top plate 203 that engages with the upper ends of the columns 202 and closes the upper part. In the figure, reference numeral 204
Is a handle for towing, which is fixed between the columns 201 on the side of the storage case 200. A shelf board 40 on which the object A such as a tray on which food or tableware is placed is placed in the storage 200.
0 is provided over a plurality of stages. The loading and unloading of the object A to and from the shelf board 400 is performed from the opening portion 500 on the front side (the side shown in FIG. 1) and the opening portion on the back surface side (not shown in the figure) of the storage case 200.

The shutter S1 that opens and closes the opening 500 has a structure similar to a so-called roll blind provided near a window, and has a sheet-like covering member (screen) 4 that can be wound upward and a covering. An operation bar 1 as an operation member attached across the width direction of the lower end portion of the member 4 and a winding mechanism 2 for the cover member 4 are configured. Both ends of the operation bar 1 are rail grooves (not shown in the figure) formed along the longitudinal direction inside the support column 202.
Is slidably engaged with.

In the figure, reference numeral 1a is a handle for raising and lowering the operation bar 1 by holding a hand. Further, reference numeral 1b is a magnet built in below the operation bar 1, and when the operation bar 1 is lowered until it comes into contact with the upper surface of the bottom plate 201 of the storage case 200, the operation bar 101 is moved by the magnetic force of the magnet 101b. It is designed to be locked. Further, a hook member 10 or the like that forms a part of the locking structure L is provided at a position near the handle 1a in the operation bar 1 (on the right side of the handle 1a in FIG. 1).

As shown in FIG. 2, the locking structure L is built in the operation bar 1, and the hook member 10 whose tip is rotatable so as to be exposed from the lower surface of the operation bar 1 and the outside of the operation bar 1. Key operation unit 30 for rotating the hook member 1
Then, when the operation bar 1 is lowered, it engages with the hook member 1 that is rotated by the operation of the key operation unit 30 at a predetermined portion of the bottom plate 201 of the storage case 200 with which the lower surface of the operation bar 1 abuts. It is composed of a lock bar 21 as a lock portion.

The hook member 10 is rotatably supported by a screw 11 in the operation bar 1 via a key cylinder as a key operation portion including a nut 12 and a washer 13. The key cylinder serving as the key operation unit 30 includes a key hole (not shown) into which the key K can be inserted, and the hook member 10 can be attached to the hook member 10 as the key K rotates.
It is designed to be rotated as shown in FIG. The lock portion is on the upper surface side of the bottom plate 201 of the storage case 200, and has a groove member 20 that forms a groove 20a into which the hook member 1 that is rotated can be inserted, and a hook member 1 that is in the middle of the groove 20a. The lock bar 21 is engaged with the lock bar 21.

Next, the operation of the locking structure L having the above configuration will be described with reference to FIGS. First, in a normal state, when the cover member 4 is wound up on the upper end side of the opening 500 of the storage case 200, the handle 1a of the operation bar 1 of the shutter S1 is gripped by hand, and the lower end of the operation bar 1 is stored in the storage case. Pull down until it contacts the bottom plate 201 of 200. As a result, the shutter S1 is detachably locked to the bottom plate 201 of the storage case 200 by the magnetic force of the built-in magnet 1b while the cover member 4 is pulled out to close the opening 500 of the storage case 200. It

When locking, the key K is inserted into the key hole of the key operation unit 30 as shown in FIG. 2 (b), and the key K is rotated clockwise. By this operation,
As shown in (a), the hook member 10 is also rotated clockwise, and the hook member 10 is engaged with the lock bar 21. As a result, the operation bar 1 and the bottom plate 20 of the storage 200 are
It is possible to prevent the situation in which 1 and 2 are locked and the shutter S1 is arbitrarily opened by a third party.

When the key K is opened, the key K is again inserted into the key hole of the key operation portion 30 and the key K is rotated counterclockwise so that the hook member 10 and the lock bar 21 are engaged with each other. Cancel the match. In this way, only the specific person who owns the key K can open the shutter S1, so that the storage box 20
It is possible to maintain the cleanliness of foods, medicines, etc. stored in 0. In the present embodiment, the groove 20a of the groove member 20.
Since the width of the hook is larger than the thickness of the hook member 10, even if the cover member 4 sways on the shutter S1 when locking or unlocking, or the positions of the operation bar 1 and the bottom plate 201 are slightly displaced, the hook The member 10 can be smoothly rotated.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments and can be modified without departing from the scope of the invention. For example, the cover member 4 of the shutter S1 is not limited to a screen made of cloth or the like, and may be configured by connecting strip-shaped metal plates. Further, the shape of the key K and the shape of the keyhole can be arbitrarily changed.

[0019]

As described above, according to the present invention, casters are provided on the bottom surface of a box-shaped storage having an opening and a shutter for opening and closing the opening, and having a plurality of shelves. A structure for locking the shutter in a transporting carriage configured to be movable, wherein the shutter includes a cover member that can be wound upward and an operation member that is attached across a width direction of a lower end portion of the cover member. At least, the operating member is provided with a hook member whose rotatably attached tip is exposed from the lower surface of the operating member, and a key operating portion for rotating the hook member. A lock portion that engages with the hook member rotated by the operation of the key operation portion is provided at a predetermined portion of the bottom plate of the storage that the lower surface of the operation member abuts when lowered. As a result, a third person cannot easily open the shutter, and it is possible to avoid theft and contamination of the placed object in the storage, and to maintain the cleanliness of food etc. as the placed object. it can.

[Brief description of drawings]

FIG. 1 is a front view of a carrier truck according to the present embodiment.

FIG. 2 is a front cross-sectional view and a side cross-sectional view of a lock structure for a shutter of a carrier truck according to the present embodiment.

FIG. 3 is an explanatory view showing the operation of the shutter lock structure of the transportation cart according to the present embodiment.

FIG. 4 is a perspective view showing the operation of the lock structure of the shutter of the carrier truck according to the present embodiment.

FIG. 5 is a front view of a conventional carrier truck.

[Explanation of symbols]

C1 carrier truck Shutter of S1 carrier truck L shutter lock structure 1 Operation member (operation bar) 1a handle 1b magnet 2 winding mechanism 4 Cover member (screen) 10 Hook member 11 screws 12 nuts 13 washers 20 groove member 21 Rock Bar 30 key operation part 200 storage 201 bottom plate 300 casters 500 openings A placed object

Claims (4)

[Claims] 1. A transporting trolley having an opening and a shutter for closing the opening so that the opening can be opened and closed, and a caster provided on the bottom surface of a box-shaped storage box having a plurality of shelves so as to be movable. In the locking structure of the shutter, the shutter includes at least a cover member that can be wound upward, and an operation member that is attached across a width direction of a lower end portion of the cover member. Provided with a hook member whose rotatably mounted tip is exposed from the lower surface of the operation member, and a key operation unit for rotating the hook member, and which is operated when the operation member is lowered. At a predetermined portion of the bottom plate of the storage with which the lower surface of the member abuts, a lock portion that engages with the hook member rotated by the operation of the key operation portion is provided. Shi Locking structure of the cutter. 2. The key operation section is a key cylinder rotatably mounted inside the operation member, and the hook member is fixed to the key cylinder. The structure for locking the shutter of the carriage as described in. 3. The lock portion includes a groove portion through which the hook member that is rotated can be inserted, and a lock bar that is laterally bridged in the groove portion and that engages with the hook member. The locking structure for the shutter of the carrier truck according to claim 1 or 2. 4. A magnet is arranged at a lower end portion of the operating member at a portion facing the bottom plate of the storage when the operating member is lowered. Item 4. A lock structure for a shutter of a carrier truck according to any one of items 3.