JPH09272303A - Movable cold reserving box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely lock a cold reserving box with casters at nonusing time of the casters, and eliminate loss of a space occupied size due to projections of casters from the bottom face of the cold reserving box as in the past. SOLUTION: A Roberval mechanism is constituted on the bottom face of a cold reserving box main body A, of rotational moving links 3, 53, caster holding members 1, and bearings 2, 52 fitted to the bottom face of the main body. Casters C are fixed to the caster holding members 1. The rotational moving links 3 are connected to the handle arms 5 through intermediate link 4, and by operating the handle arms 5, the rotational moving links 3 are rotationally moved, so as to elevatably move the caster holding members 1. The handle arms 5 are fixed by fitting a lock bar 10 fitted to the handle arms 5 into the lock groove of an L-shape steel 8 provided on the main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box, and more particularly, to a mobile box provided with casters.

[0002]

2. Description of the Related Art A cool box for storing frozen foods in a frozen / refrigerated state has a heat insulation structure on the outer wall and is equipped with a cool storage agent, a freezing device, etc. It is heavy. Therefore, as a means for facilitating the movement, a device provided with casters at the bottom of the cool box body is widely used. In this case, when you keep the cool box at a certain place, make sure that the casters do not work.
Brake lock is applied to the casters to prevent the cool box from moving carelessly.

[0003]

However, in the case where the caster is provided, the entire cool box is bulky by the height of the casters, and a large space for keeping the cool box is required. Therefore, refrigerating
In the case of storing and transporting an article requiring cooling, the carrying volume of the vehicle is made relatively small, and in the case of a covered vehicle, the space between the article and the ceiling is made small, which makes cargo handling work difficult.

Many of the above-described caster brake lock mechanisms are simple, and the brake lock is disengaged due to vibrations during running of the vehicle or shocks when the vehicle starts or stops, and the cold storage box moves inside the vehicle to keep it cool. The impact on the transported goods in the warehouse may be increased and damage may be caused.

In view of the above problems, the present invention improves the cargo handling workability of a cooler with casters, and when the cooler is stored, the casters are floated from the mounting surface so that the bottom of the cooler comes into direct or indirect contact. In this way, it is an object to provide a mobile cool box that does not move inadvertently in the vehicle by breaking the brake lock of the casters.

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 provides a container having a cold insulation means and a movable cold storage box provided with casters at the front and rear of the bottom of the container, wherein the casters are The caster is movable up and down relative to the mounting surface of the container, and when the caster is not in use, all of the casters can be stored at a position apart from the mounting surface of the container, and the bottom surface of the container. Is configured to directly or indirectly contact the mounting surface so that the cold storage does not move.

According to the present invention configured as described above, when the caster is not used, the cold storage box does not move because the entire bottom surface of the container contacts the mounting surface.

According to a second aspect of the present invention, the front and rear casters are attached to and integrated with a holding member, and the holding member constitutes a Roberval mechanism. As a force source for the parallelogram movement of the Roberval mechanism, a container is used. A caster can be raised and lowered and fixed by connecting a force point of a handle arm that can be rotated and fixed around a pin fitted to a bearing provided on the shaft to the Roberval mechanism through an intermediate link. Is adopted.

According to the present invention constructed as described above, the caster acts when moving the cool box because the Roberval mechanism moves in parallelogram through the intermediate link to move the caster up and down by the operation of the handle arm. The casters are housed when the cool box is to be stored, and the bottom surface of the container directly contacts the mounting surface to completely prevent inadvertent movement.

According to a third aspect of the present invention, a mounting surface contact shoe is provided on the bottom surfaces of both the front and rear casters on both sides of the container, the mounting surface contact shoes moving in parallelogram by the Roberval mechanism and contacting and separating from the bottom surface of the container. As a force source for the parallelogram movement, the force point of the handle arm provided so as to be rotatable and fixed around the pin fitted into the bearing provided in the container is connected to the Roberval mechanism through the intermediate link. The configuration is adopted.

According to the present invention configured as described above, in addition to the effects of the above-described two inventions, the caster is directly attached to the bottom surface of the container and is not directly involved in the elevation of the container, so that the life of the caster is extended and the structure is improved. It becomes easier and the installation work becomes easier.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. A in FIG. 1 is a cooler main body (hereinafter, also simply referred to as main body A) for storing frozen articles and the like, and casters C for movement are provided at four corners of the bottom surface of the main body A, and the casters C are moved to the rear side of the main body A. A handle B for pushing and pulling the main body A is sometimes provided. The lid D is put on the body A top, the lid D is divided into the lid D ₂ rear and front lid D ₁ in the front-rear direction central position of the body A, hunting case D _1, D ₂ are hinged E
It is connected with and can be opened and closed from both front and back. F is a handle hole for opening and closing the rear lid D ₂ , and although not shown, the front lid D ₁ is also provided with a handle hole at a position symmetrical to the rear lid D ₂ . FIG. 2 shows a state in which the rear lid D ₂ is opened.

As shown in FIG. 3, the body A of the cool box is
The main body side wall A ₁ , the main body bottom plate A ₂ lid D, and the front and rear walls (not shown) all have a heat insulating structure in which a heat insulating material W is incorporated. G is a corrugated plate. Between the corrugated plate G and the inner surface of the side wall A ₁ of the main body, a regenerator H and a plate-shaped evaporator I, which is a component of the refrigeration cycle, are installed. The corrugated plate G separates the stored items to be kept cool from the cool storage agent H, and prevents the gelled cool storage agent in the bag from settling due to its own weight, and adheres to the plate cooler I with a constant thickness in the height direction. It also helps to efficiently dissipate and circulate cold energy.

On the bottom surface of the main body A, there is provided a refrigerating device J shown as a rectangular parallelepiped in the figure, but its internal structure is not the main subject of the present invention, so its explanation is omitted and its spatial arrangement is shown. . The caster holding members 1 to which the casters C are attached are arranged along the front-rear direction of the main body A at positions on both sides in the width direction (left-right direction in FIG. 3) of the refrigerating apparatus J. The caster holding member 1 is made of channel steel, and the caster C is fixed inside the opening of the channel steel by welding.

FIG. 3 shows a state in which the caster C is used. The caster C projects downward from the bottom surface J ₁ of the refrigerating device J, and the wheel surface of the caster C is in contact with the ground K. . The caster C is movable in the vertical direction in the figure as shown below, and moves upward when not in use, and the lower surface of the wheel is located above the bottom surface J _{1 of the} refrigerating device J, and The bottom surface J _{1 of the} device J comes into contact with the ground K. In addition, M is a gasket for keeping the lid D and the upper edge of the main body side wall A ₁ in a hermetically sealed state.

Next, the mounting structure of the casters C of this cool box will be described with reference to FIGS. 4, 5 and 6, and the caster holding members 1 on both sides of the refrigerating machine J and the following various types of attachments to them. Since the members are symmetrical in the width direction of the main body A, only one will be described.

4 and 5 show how the caster holding member 1 on the rear side of the main body A is attached. A bearing 2 made of grooved steel is fixed to the corner of the bottom surface of the main body A by welding.
A rotary link 3 which is formed of a grooved steel and constitutes a Roberval mechanism is fitted into the shaft, and is rotatably attached by a pin P ₂ . The caster holding member 1 is formed of grooved steel having an inner dimension in the width direction (inner dimension of the back plate) larger than the width dimension of the grooved steel of the rotary link 3, and is a predetermined distance from the edge of the back plate. Is notched, the end of the rotary link 3 is fitted into the notch, the pin P ₁ is inserted, and the pin P ₁ is rotatably mounted around the pin P ₁ .

As shown in FIG. 5, the rotary link 3 has a projecting portion 23, and one end of an intermediate link 4 made of grooved steel is rotatably connected to the end of the projecting portion 23 by a pin P _41. The other end of the intermediate link 4 is rotatably connected to the force point of the handle arm 5 made of channel steel by a pin P ₄₂ .

This handle arm 5 is rotatably attached to a grooved steel bearing 6 provided on the back surface of the main body A by a pin P ₅ , and this bearing 6 is used for locking the handle arm 5 described below. The L-shaped steel 8 provided with the groove 7 is fixed by welding to the surface side of the mounting surface to the main body A. This L-shaped steel 8
Is attached to the main body A on one of the side plates, the other side plate 28 projects at a right angle from the rear surface of the main body A, and the groove 7 having a predetermined depth is provided from the upper edge of the side plate 28.

On the other hand, one side plate 25 of the channel steel of the handle arm 5 is provided with an elongated hole 9, and the elongated hole 9 and
The lock bar 10 is inserted over a long hole provided in a pair of handle arms (see FIGS. 1 to 3) not shown in FIG. The long hole 9 has a length dimension which is longer than the entire length of the groove 7 of the L-shaped steel 8 by the diameter of the lock bar 10 or more, and the long hole 9 and the groove 7 of the main body A when the handle arm 5 is upright. The groove width and the hole width overlap along the front-back direction, and
The elongated holes 9 and the lower ends of the grooves 7 are adapted to coincide with each other.

Therefore, if the lock bar 10 is moved downward along the elongated hole 9 in this state, the lock bar 10 is fitted at both the lower end of the elongated hole 9 and the lower end of the groove 7, and the handle arm 5 is moved. The upright state of is fixed. To release the fixed state of the handle arm, on the contrary, the lock bar may be pulled up along the elongated hole 9 (and the groove 7) and the lock bar 10 may be taken out from the groove 7. When the fixed state of the handle arm 5 is released in this way, the handle B (not shown in FIG. 5) rotates together with a pair of handle arms (see FIGS. 1 to 3) around the pin P ₅ as an axis. It becomes possible.

As shown in FIGS. 4 and 5, the vicinity of the handle arm 5 side end portion of the intermediate link 4 is bulged outwardly because the handle arm 5 mounting insert pin P is formed.
_This is to allow the crimped portions at both ends of ₅ to escape.

FIG. 6 shows the caster holding member 1 on the front side of the main body A.
Shows the installation of. A rotary link 53, which constitutes a Roberval mechanism together with the rotary link 3 shown in FIG. 5, is rotatably attached to a grooved steel bearing 52 provided at a corner of the bottom surface of the main body A by a pin P ₁₁ , and the caster holding member 1 End 51 of
Is rotatably attached to the rotary link 53. This structure is the same as the rear side, but the positions of the front bearing 52 and the rotation link 53 in the main body width direction are different from those on the rear side, and they are at positions largely displaced inward from the side surface of the main body. The end portion 51 of the holding member 1 does not have a notch on the upper surface (the back plate of the channel steel) like the rear side, and the rotation link 5
3 is not fitted in the caster holding member 1, but is arranged adjacent to the caster holding member 1 in the width direction. Then, the left and right rotation links 53, 53 (see FIGS. 1 and 2).
The caster holding members 1 and 1 are connected by a single shaft 54.

Further, the front side rotation link 53 is not connected to the handle arm via the intermediate link 4 like the rear side, but is attached to the bearing 52 with a shaft hole 55.
And a shaft hole 56 for mounting the caster holding member 1 only. The disposition intervals of both shaft holes 55 and 56 are such that the corresponding shaft holes 35 and 36 (see FIG. 5) of the rear side rotation link 3 are arranged so that the rotation radius of the rotation link 53 becomes equal to that on the rear side. And the shaft holes 35 and 55
Is also equal to the distance between the shaft holes 36 and 56. That is, the front and rear pivot links 53, 3 and the caster holding member 1 constitute a Roberval with respect to the bottom surface of the main body A as shown in FIG. 7A. The caster C of the cool box having the above structure is operated as follows.

First, when the cooler is moved by using the casters C, the above-described FIG. 3 (or FIGS. 1 and 2) is used.
Also, as shown in FIG. 7A, the caster C projects downward from the bottom surface J ₁ of the refrigerating device J, and its wheels are in contact with the ground K. At this time, as described above, the handle arm 5 is fixed so that the lock bar 10 is fitted in both of the lower end of the slot 9 and the lower end of the groove 7 in an upright shape, and thus the handle B is not attached. You can push and pull to move the cool box.

When the cool box is kept in a desired place, the caster C is moved upward from the bottom surface J ₁ of the refrigeration system J. At this time, first, as shown by the arrow in FIG. 8A, the elongated hole 9 of the handle arm 5 and the L-shaped steel (see FIG. 5)
The lock bar 10 fitted in the groove 7 is displaced upward along the elongated hole 9 and pulled out from the groove 7 to release the fixed state. As a result, the handle arm 5 has the pin P ₅
It becomes possible to rotate about the axis.

When the handle arm 5 is rotatable, as shown in FIG. 8B, when the handle arm 5 is rotated, the handle arm 5 pushes the intermediate link 4 in its longitudinal direction. The other end of the intermediate link 4 presses the swing end 23 of the rotary link 3, and the rotary link 3 pushed by the intermediate link 4 has the pin P ₂ fitted in the hole 35 as an axis. (See FIG. 5) When rotated clockwise in the drawing, the rotation links 3 and 53 and the bearing 2 provided on the bottom surface of the main body A.
The line connecting 52 and the caster holding member 1 cause a parallelogram movement, and the caster C is stored above the bottom surface of the main body A (see FIG. 7). Therefore, as shown in FIGS. 8 (c) and 7 (b), the wheel surface of the caster C is completely separated from the ground K, and instead, the bottom surface J ₁ of the refrigerating device J comes into contact with the ground. Further, the upper surface of the caster holding member 1 contacts the bottom surface of the cool box body A.

Then, the lock bar 1 is inserted into a lock notch groove 11 provided on the inner side wall of the intermediate link 4.
0 is inserted to lock the handle arm 5 so that the caster holding member 1, that is, the caster C does not drop downward.

Since the Roberval mechanism is stable when the caster C is used, the horizontal position of the hole 36 attached to the caster holding member 1 of the rearward rotation link 3 shown in FIG. 5 is 35. It is desirable to exist on the rear side of the vertical line passing through the hole.

Next, a second embodiment will be described with reference to FIGS. 9 to 15. It should be noted that since it is symmetrical with respect to the length direction of the main body, only one side will be described.

FIG. 9 is a perspective view of this embodiment as seen from the bottom, in which casters C are directly attached to the front and rear of the bottom of the main body A, and to the sides. Bearings ₂ , 52 are attached to the outside of the caster C directly attached, and pivot links 3, 53 are rotatably connected to the bearings ₂ , 52 by pins P ₂ , P ₁₁ .

A mounting surface contact shoe 1s is connected to the other end of each of the rotating links 3 and 53. This connection, the forward end 51 of the mounting surface abutting shoe 1s is rotatably connected by a pin P _53, it is rotatably connected to same by a pin P ₁ in the rear end 21, as a whole Roberval mechanism Are configured.

One end of the intermediate link 4 is rotatably connected to the swinging end 23 of the rotating link 3 by a pin P ₄₁ , and the other end is connected to the force point of the handle arm 5 by a pin P ₄₂ . The handle arm 5 is rotatably and fixedly attached to a bearing 6 attached to the wall surface of the main body A by a pin P ₅ . Therefore, when the handle arm 5 is turned up and down around the pin P ₅ while holding the handle B, the intermediate link 4 pushes and pulls the swinging end 23 of the turning link 3, thereby forming a Roberval mechanism. The mounting surface abutting shoe 1s moves in parallelogram and moves toward and away from the bottom surface of the main body A, so that the wheels of the casters C contact the mounting surface (ground) K and the mounting surface (ground) K. It floats from the surface.

In FIG. 10, the mounting surface contact shoe 1s is the main body A.
A state in which the handle arm 5 approaches the bottom surface, that is, is pulled up, the handle arm 5 is pivoted up about the pin P ₅ and pulled up, and the lock bar 10 is fitted into the slots 9 and the bottom of the groove 7. (See FIG. 5) The state is fixed. FIG.
The state which looked at the said state from the back is shown.

In FIG. 12, the mounting surface contact shoe 1s is the main body A.
In the state where the handle bar 5 is separated from the bottom surface, that is, is protruded toward the mounting surface, and the handle arm 5 is rotated downward about the pin P ₅ and pulled down, the lock bar 10 is turned on. It is fitted in the notch groove 11 (see FIG. 14) and its state is fixed. FIG. 13 shows the above state viewed from the front.

Next, referring to FIG. 15, the operation from the state in which the caster C is in contact with the ground to the state in which the caster C is lifted from the ground by the operation of the mounting surface contact shoe 1s and the cool box is placed is explained. To do. FIG. 1A shows a state in which the handle arm 5 is pivoted upward with the pin P ₅ as an axis and pulled up, and the swing end 2 of the pivot link 3 via the intermediate link 4.
3 is pulled up, the mounting surface contact shoe 1s approaches the bottom surface of the main body A, the caster C is in the grounded state, and the lock bar 10 is located at the bottom of the slot 9 and the groove 7 and is in that state. Is fixed.

FIG. 2B shows a stage in which the caster C shifts from the grounded state to the floating state.
0 is pulled up from the bottom of the long hole 9 and the groove 7, the fixed state is released, and the handle arm 5 rotates about the pin P ₅ as an axis and is connected to the operating point of the handle arm (corresponding to the pin P 42). The other end of the intermediate link 4 is the swing end 23 of the rotary link 3.
By pressing, the rotation link rotates clockwise about the pin P2 as a pivot, so that the mounting surface contact shoe 1s, which is a constitution of the Roberval mechanism, moves away from the bottom surface of the main body A to the mounting surface side. Go.

FIG. 3C shows the caster C completely lifted from the ground, that is, the mounting surface contact shoe 1s is separated from the bottom surface of the main body A. Handle arm 5
Is lowered downward, the swing end 23 of the rotary link 3 is sufficiently pushed down, and the position of the pin P ₁ passes through the perpendicular line lowered from the pin P ₂ and the intermediate link 4 comes into contact with the main body wall surface to stabilize. The lock bar 1
0 is fitted in the groove 11 as shown in FIG. 14 to fix the state.

[0039]

As described above, according to the present invention, the caster of the cool box with casters can be moved up and down with respect to the cool box body. When the caster is not used, the caster is moved upward from the bottom of the cool box. Since the bottom of the cool box is placed in contact with the ground, the vertical dimension can be reduced by the height of the caster itself. Furthermore, movement of the cool box body can be completely prevented when the caster is not used.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment.

FIG. 2 is a perspective view with the lid open.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a diagram showing a part of the rear side.

FIG. 5 is an exploded perspective view showing the main part on the rear side.

FIG. 6 is an exploded perspective view showing a main part of the front side.

FIG. 7A is a side view of the first embodiment in which the casters are used and in which the casters are not used.

FIG. 8 (a) shows the start point of the caster pulling up,
(B) shows a state in which the casters are being pulled up, (c)
Is a side view of essential parts showing the operation process of the embodiment showing the end time of pulling up the casters.

FIG. 9 is a perspective view from the bottom of the second embodiment.

FIG. 10 is a side view of the caster grounded.

11 is a view seen from the rear of FIG.

FIG. 12 is a side view of the caster lifted in the second embodiment.

13 is a front view of FIG.

14 is a perspective view of essential parts showing a fixed state of a handle arm in FIG.

FIG. 15 (a) shows a state in which the casters are grounded,
(B) shows the state of the caster floating up,
(C) is an operation process explanatory diagram showing the caster in a completely lifted state

[Explanation of symbols]

 A main body C caster 1 caster holding member 2, 6, 52 bearing 3, 53 rotating member 4 connecting member 5 handle arm 7 groove 8 L-shaped steel 9 long hole 10 lock bar

Claims (3)

[Claims] 1. In a mobile cool box provided with a container having a cooler and a caster on the front and rear of the bottom of the container, the caster can be moved up and down relatively with respect to a mounting surface of the container. , When the casters are not in use, all of the casters can be stored at a position away from the mounting surface of the container, and the bottom of the container directly or indirectly contacts the mounting surface so that the cool box does not move. A mobile cool box that is characterized by. 2. The front and rear casters are attached to and integrated with a holding member, and the holding member constitutes a Roberval mechanism. The Roberval mechanism is fitted into a bearing provided in a container as a force source of parallelogram movement. The caster can be raised and lowered and fixed by connecting a force point of a handle arm that is rotatable and fixed about the pin to the Roberval mechanism via an intermediate link. The mobile cool box described in. 3. The force of parallelogram movement of the Roberval mechanism is provided on the bottom surfaces of both sides of the front and rear casters, which are provided with a mounting surface contact shoe that moves in parallelogram by a Roberval mechanism and moves toward and away from the bottom surface of the container. A force source of a handle arm, which is provided as a source of the pin, which is fitted into a bearing provided in a container so as to be rotatable / fixable about an axis, is connected to the Roberval mechanism via an intermediate link. The mobile cool box according to 1.