JP3131500B2 - Container side lid mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an opening in a side wall so that an article can be stored in or taken out of the container from the side wall of the container even when the containers are stacked. More specifically, the present invention relates to a side lid mounting structure in a container having a side lid capable of opening and closing an opening, and more specifically, a slight movement to the front of the opening and a vertical direction without rotating the side lid forward to open and close. Concerning the container side lid mounting structure that can be opened and closed by almost vertical parallel movement

[0002]

2. Description of the Related Art Conventionally, there has been known a container in which stored items can be taken in and out from the side of the container in a state where the containers are stacked. For example, Japanese Utility Model Publication No. 56-47069 discloses a plastic container having a bottom wall, a peripheral wall (side wall), and a plate (side cover) rotatably attached to an opening of the peripheral wall. The side wall side bearing part (hole) is provided at the lower end of the part, and the lid side bearing part (hole) is provided at the lower end part of the right and left side edges of the side lid, and the lid side bearing part is rotated by the rotating shaft to the side wall side bearing part. Attach freely, rotate the side lid around the rotation axis to open the side wall opening,
They had to put things in and out of the container.

[0003] In the above-mentioned conventional example, there is a possibility that the side lid is easily opened when the article stored in the container is pressed from the inside of the container due to movement or the like. Also,
In order to improve this problem, for example, Japanese Patent Publication No. 2-1001
No. 8 proposes a mounting structure for a side lid of a container. In this conventional example, a lower bearing portion is provided below the left and right side edges of the side wall opening, a locked portion is provided at an upper edge of the side wall opening, and a lid bearing portion is provided at a lower end portion of the left and right side walls of the side lid. And a lock portion having a protruding portion that protrudes from the upper end surface of the side cover and retreats by operation of the operation portion on the outer surface side of the side cover is provided on the upper portion of the side cover, and the lid-side bearing portion of the side cover is opened to the side wall opening of the container. The side cover is rotatably mounted on the lower bearing portion so that the protruding portion of the locking portion of the side cover can be removably locked to the locked portion at the upper edge of the side wall opening. However, this type of container known in the related art including the above-described conventional example has a rotating shaft for opening and closing the side cover at a lower end portion, and its position is almost fixed, and when opening and closing the side cover, it is rotated. The width of the turning radius corresponding to the size of the side lid was required in front of the side lid with the axis as the axis.

[0004]

In the conventional container, when the side cover is opened and closed, the radius of rotation hinders the work of an operator or the like according to the size of the side cover, and an extra space is required. For example, when stacking containers and placing them in a row with shelves sandwiching the aisle, it is necessary to make the width of the aisle wider in order to make it easy to put things in and out of the container. The side lid protrudes forward, hindering work.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a side lid mounting structure for a container having an opening in a side wall and a side lid for opening and closing the opening. An object of the present invention is to provide a side lid mounting structure that can be opened and closed by parallel movement and vertical movement.

[0006] Another object of the present invention is to provide a method for opening and closing the side cover.
An object of the present invention is to provide a side lid mounting structure which can reduce the work space at the time of opening / closing operation and opening, can easily enter / exit articles, and has excellent workability / operability.

Another object of the present invention is to provide a side container mounting structure for a folding container, which is suitable for a side container of a folding container, does not hinder the folding structure, and can exhibit the above characteristics when the container is assembled. To be.

[0008]

According to the present invention, there is provided a side lid mounting structure for a container having a bottom wall, a side wall, a side wall opening provided in the side wall, and a side lid capable of opening and closing the opening. A hollow slide rail with a groove is provided on the left and right edges of the peripheral portion of the opening of the side wall with the groove facing inward, and a bearing portion of one of the link shafts (axis A) is provided on both left and right ends of the upper end of the side lid. Is established,
The link shaft is composed of a link portion and a shaft A having a slide piece at an end portion and a shaft A which is orthogonal to the link portion at both ends of the link portion and protrudes in mutually opposite directions, and a shaft B having the slide piece at an end portion. The shaft B is rotatably pivoted, and the shaft B is fitted with a slide piece in the hollow portion of the slide rail and is rotatably slidably engaged with the groove. When the opening of the side cover is closed, the shaft B of the link shaft is closed.
To the upper end of the slide rail, the axis of axis A is positioned on the axis of axis B, and the side lid can be fitted and fixed between the opposing slide rail and the upper and lower edges of the periphery of the opening. The opening and closing of the opening is performed by slightly moving the opening and closing up and down without substantially rotating the side lid. A side lid mounting structure for a container is provided that is enabled by directional movement.

According to the present invention, as the locking mechanism, a flange-shaped receiving portion is provided which locks the inner peripheral side of the upper, lower, right and left ends of the side cover with a front recessed structure as a locking mechanism. At the front of the edge, a locking projection is provided for locking the front side of the upper end of the side lid projecting downward, a locked portion is provided at the lower edge of the opening peripheral edge, and the outer surface of the lower portion of the side lid is provided. It is preferable that a lock portion having a protruding portion that can be retracted from the lower end surface of the side lid by operating the operation portion is provided.

The side lid mounting structure of the present invention is suitable for use in a folding container.

[0011]

In the side lid mounting structure of the present invention, slide rails are provided on the left and right edges of the peripheral edge of the side wall opening, with the grooves facing inward (toward the opposite slide rails).
Link shaft bearings are provided at the left and right ends of the upper end of the side cover. The link shafts are provided at the ends of the link A and the ends of the shafts A, which are orthogonal to the ring and project parallel and opposite to each other at opposite ends of the link. It consists of a shaft B having a slide piece. The shaft A is rotatably pivotally mounted on the bearing of the side cover, and the shaft B is fitted with a slide piece in a hollow portion of the slide rail and is rotatably slidably engaged with the groove. Is the first feature.

Since the side lids are engaged with the slide rails via the link shafts at the right and left ends of the upper end, the link shaft is tilted sideways forward with the shaft B as a rotation fulcrum.
And the side lid can be moved up and down almost in parallel with the slide rail with the side lid being on the front side of the side wall front face. In this state, the axis B is lowered to the lower end of the slide rail by its own weight. Can be opened. When raising the side cover, the shaft B slides up on the slide rail, and when the shaft B reaches the upper end of the slide rail, the link shaft rotates around the shaft B as a rotation fulcrum, and the axis of the rising shaft A becomes the shaft. It moves on the axis of B and at the same time the side lid moves rearward in parallel, so that it can be fitted to the closed position.

When the opening of the side lid is closed, the axis B is raised to the upper end of the slide rail, and the axis of the axis A is positioned on the axis of the axis B. The second is that a detachable locking mechanism that fits between the upper and lower edges and can stably lock the side lid in this state is provided between the peripheral edge and the side lid end. It is a feature of.

In the locking mechanism, the end of the side lid is locked by the flange-shaped receiving portion of the front concave structure at the periphery of the opening, so that the side lid does not move inward from the side wall. The locking projection provided on the upper edge of the peripheral portion of the opening engages the upper end of the side cover with the flange-shaped receiving portion. A locked portion provided at a lower edge portion of the opening peripheral portion, and a lock portion having a protruding portion that retreats downward from the lower end surface of the side cover by operating an operation portion on the outer surface of the lower portion of the side cover. The lower end of the side cover can be engaged with the lower edge of the peripheral portion, and prevents the side cover from moving forward unless the locked state is released by raising the protruding portion by operation on the outer surface side.
The flange receiving portion also prevents the contents of the container from hitting the inner end of the side lid. Thus, the side lid is stably locked when the opening is closed.

When the opening is closed, the position of the front side of the side cover substantially coincides with or retreats from the front side of the side wall, and the position of the rear side of the side cover is the position of the rear side of the side wall. Since the side lid does not protrude from the side wall because it coincides with or is advanced, folding and assembling in the folding container are facilitated.

If the protrusion of the lock portion is raised to release the engagement with the locked portion and the lower end of the side cover is moved forward, the weight of the lock is reduced.
The rotation of the link shaft causes the side cover to move forward, and at the same time, the engagement of the upper end of the side cover is naturally disengaged, so that the side cover moves downward in parallel with the slide rail to open the opening.

[0017]

Preferred embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an example of a container provided with a side lid mounting structure according to the present invention, wherein FIG. 1 is a perspective view of a side wall opening when closed, and FIG. 2 is a perspective view of a side wall opening when opened. FIG. This container 1 may be a non-folding container or a folding container. The container 1 is open at the top, and has a bottom wall 2, a side wall 3, and an opening 4 in the side wall and a side lid 5 that can open and close the opening 4 in a part of the side wall 3.

Since the peripheral edge of the opening 4 has a front recessed structure, the side lid 5 can be fitted from the front side and received by the peripheral edge to close the opening 4. The upper and lower containers have concave portions recessed inward (opening side), the upper edge 6 is narrower than the lower edge 7, and the left and right side edges 8 are upper ends. The part is protruding inside. Slide rails 9 are provided vertically between the concave portions of the right and left side edges 8 and the lower edge 7 with the guide grooves 10 facing inward (toward the opposite slide rails). The slide rail 9 has a guide groove 10 and a hollow portion 11 in which a center of one long side of a rectangular hollow body having a rectangular cross section as shown in FIGS. 1
2 is closely attached to the side edge 8 below the step. For mounting, appropriate means such as screwing, pinning, bonding, welding, fitting and the like can be used. Also, they may be integrally formed. The hollow portion 11 of the slide rail is provided with a ridge 13 on the inner side to facilitate sliding of the slide piece.

The side lid 5 is provided with a concave portion 14 in which both right and left ends of the upper end are uniformly depressed inward. A bearing portion 15 (not shown in the figure) is provided at the upper part of the recess from the side to the inside. The link shaft 16 is connected to a link portion 17 as shown in FIG.
And a shaft A18 and a shaft B19 which are orthogonal to the link portion and project in opposite directions parallel to each other at both ends of the link portion, and a flange-shaped slide piece 20 is provided at the tip of the shaft B19. The shaft A18 of the link shaft is rotatably pivotally mounted on the bearing portion 15 of the side cover, and the shaft B19 is fitted with the slide piece 20 in the hollow portion 11 of the slide rail, and the shaft B19 is freely slidable in the guide groove 10. Is engaged. A link shaft 1 is provided between the side edge of the concave portion 14 of the side cover and the upper edge 8A on the right and left side edges of the opening peripheral edge.
6 is open to facilitate storage and rotation.

A flange-shaped receiving portion 21 is provided at the peripheral edge of the opening 4 in the side wall. A locking projection 22 is provided on the front side of the upper edge portion 6 of the peripheral portion of the opening 4 so as to project downward in a left-right pair.

As shown in FIG. 5, a locking portion 23 for fitting a locking protruding portion 26 protruding downward from the lower right and left lower ends of the side cover 5 is fitted to the lower edge 7 of the peripheral portion of the opening 4. Is provided, and a tapered slide slope 24 is provided on the front side thereof. The side lid 5 has a stopper 25 incorporated at the lower end as a lock portion.
A lock projection 26 is provided at the lower end of the pair 5 on the left and right. The upper surface of the stopper 25 is pushed downward by a rod 27 located above the stopper 25 provided on the side lid 5 main body, and protrudes the locking projection 26 downward. The stopper 25 has a lock projection 28 on the front surface thereof, which is fitted into a long hole 29 on the front left and right of the lower end of the side lid 5 main body. It is located at the lower end of 29 and can be moved to the upper end of the long hole 29 by operating the stopper 25 from the outside to raise it. In this state, the locking projection 26 retreats to the line of the lower end of the side cover 5.

In FIG. 1, the shaft B19 is at the upper end of the guide groove 10 of the slide rail, and the axis of the shaft A18 is
The side lid 5 is fitted on the peripheral portion of the opening 4, the rear peripheral edge is supported by the flange-shaped receiving portion 21, the upper front surface is locked by the locking projection 22, and The protruding locking projection 26 is locked to the locked portion 2 of the lower end 7 of the opening peripheral edge.
3, the opening 4 is closed. At this time, the side cover 5
The rear surface is formed with a step on the periphery so that the rear surface is fitted in the flange-shaped receiving portion 21 so that the rear surface of the flange-shaped receiving portion 21 and the rear surface coincide with each other.

When the opening 4 is opened, the locking projection 26 is released from the engagement with the locked portion 23 by raising the stopper 25 from the front surface, and at the same time, the side cover 5 slightly moves forward, and The projecting portion 26 slides on the slope 24, and the engagement of the upper end of the side cover is naturally disengaged by the weight of the side cover and the rotation of the link shaft 16, and further moves forward and then moves downward in parallel with the opening 4. An opening can be made (FIG. 5).

The outline of the structure has been described above. Further, the side lid mounting structure will be described in detail based on the embodiment of the folding container. In FIG. 6 showing an example of the folding container, the container 1 includes a frame 31, a bottom plate 32,
It is attached to the frame 31 and the bottom plate 32 so as to be rotatable, respectively, and further connected to bend at the connecting portion 33.
A side plate 34 composed of a plurality of plate-like portions 34A and 34B, and a tilt plate 35 that is rotatably attached to the frame 31 are provided. The folding container 1 is in a state where the pair of side plates 34 are extended (that is, the upper and lower plate-like portions 34A,
The container is assembled by setting up a pair of tilting plates 35 after making the pair of tilting plates 35 straight into one plane, and then folding the tilting plates 35 inside the frame 31 and then connecting the side plates 24 to each other. When folded at the part 33, the container is in a folded state. In the folding container, the side wall 3 includes a side plate 34 and a tilt plate 35, and the side wall opening 4 and the side lid 5 are provided on at least one of the pair of tilt plates 35.

The tilt plate 35 has a frame 36 and a side lid 5 for opening and closing the opening 4 of the frame 36 as shown in the right half of the front side view of FIG. In FIG. 7, the link shaft 16
The periphery is partially cut away. The frame 36 has a bearing 37 for pivotally connecting a connecting shaft for connecting the frame 31 inward from the side to the left and right ends of the upper end, and the container 1 is assembled at the center of the lower end. A lower engaging portion 38 for locking the bottom plate 32 at a predetermined position, and a side engaging portion for fitting an engaging projecting portion at an end portion of the side plate 34 when the container 1 is assembled in the middle of both right and left ends. A part 39 is provided.

As shown in FIGS. 10, 11 and 12, the frame 36 has a recessed front surface at the periphery of the opening 4. As shown in FIG. The upper left and right corners of the peripheral edge are uniformly depressed inward to form a recess, the upper edge 6 is narrower than the lower edge 7, and the right and left side edges 8 are uniformly formed at the upper end. It has an upper end side edge 8A protruding inward and a step side edge 8B to form a step. A slide rail 9 is provided between the step side edge 8B of the left and right side edge 8 and the lower edge 7 with the guide grooves 10 facing each other (FIG. 7). The concave structure of the peripheral part is the side lid 5
Has a flange-shaped receiving portion 21 that receives and supports the rear peripheral edge of the side lid 5 when the front cover 5 is fitted. The vertical flange-shaped receiving portion 21 has a large width so as to protrude inward even when the slide rail 9 is attached. The upper edge 7 is provided with locking projections 22 projecting downward at the front side in the left and right pairs, and the lower edge 7 has a locked portion 23 for fitting a locking projection 26 at the lower end of the side lid. Is provided.

The side cover 5 is, as shown in FIGS.
The plate 41 has a front concave structure in which both side edges are raised in the form of ribs. The upper end also rises forward in an arc shape, but the front end is slightly receded from the front surface of the side lid 5. The left and right ends of the upper end of the side cover 5 are uniformly recessed inward and the recess 1 is formed.
4 are provided. A bearing portion 15 is provided at an upper portion of the concave portion so as to face inward from a side portion. Below the horizontal ribs 42 reaching the left and right ends, a horizontal rib 43 is also provided slightly below the center, and vertical ribs 44 and 45 are provided below the horizontal ribs 42.
Oblique hole 4 diagonally downward from the corner where 2 and vertical rib 44 intersect
6 is provided, and a rod-like portion 27 is provided, which is obliquely lowered from a position retracted from the front end in the middle of the vertical rib 44. Also vertical rib 4
4 and 45, a front plate 47 is provided.
Is provided.

The stopper 25 provided on the side cover 5 as a lock portion has a shape shown in FIGS. 14A and 14B. Has formed. Lock projections 28 projecting to the front are provided on the left and right sides of the recess 50, and locking projections 26 projecting downward are provided at the lower ends of the left and right ends. The stopper 25 is installed below the side lid 5 main body (FIG. 7). On the upper surface of the stopper 25, the rod 27 and the push-up lock projection 28 are fitted into the elongated hole 29. In a state where the lock projection 28 is engaged with the elongated hole 29, the rod-like portion 27 functions as a spring material due to the resilience and presses the stopper 25 downward, so that the lock projection 28 is at the lower end of the elongated hole 29, and the locking projection 26 is provided. Project below the lower end of the side cover 5. When the stopper 25 is put into the recess 50, the rod 27 is pushed up and the stopper 25 is slid up until the lock projection 28 is positioned at the upper end of the elongated hole 29. In this position, the locking projection 26 is retracted within the lower end of the side cover 5.

The shaft A18 of the link shaft 16 is rotatably pivoted on the bearing portion 15 of the side cover 5, and the slide piece 20 of the shaft B19 is fitted into the hollow portion 11 of the slide rail, and is fitted into the guide groove 10 on the shaft B19. It engages freely and slidably. The concave portion 14 of the side lid 5 forms a sufficient space between the left and right side edges 8A of the opening peripheral edge and the upper end side edge 8A for facilitating the storage and rotation of the link shaft 16.

When the side cover 5 is fitted into the periphery of the opening, as shown in FIGS. 7 and 8, the axis B19 of the link shaft 16 is at the upper end of the slide rail 9, and the axis of the axis A18 is the axis of the axis B19. The peripheral edge of the rear surface of the side lid 5 is located above the flange-shaped receiving portion 2.
1 and the rear edge of the side cover 5 is slightly stepped so that the rear surface excluding the peripheral edge fits with the rear surface of the flange-shaped receiving portion 21. The front surface of the upper end has a locking projection 2
Locked by 2. The lower end of the side cover 5 closes the opening 4 by fitting the locking projection 26 to the locked portion 23 of the frame 36 as shown in FIG. In this state, the positions of the front and rear surfaces of the frame 36 and the positions of the front and rear surfaces of the side cover 5 substantially match.

When the closed opening 4 is to be opened, a hand is put into the concave portion 50 of the stopper 25 of the side cover 5 and the side cover 5 is lifted. Is released and the side cover 5 moves slightly forward, almost at the same time the link shaft 16 rotates forward, the shaft A18 comes in front of the axis B19, and the side cover 5 moves forward in parallel, and the opening is closed by its own weight. When the shaft B19 reaches the lower end of the guide groove 10 by descending in parallel to the side 4, the side lid 5 stops, and the opening 4 is fully opened (FIG. 8).

When closing the opening 4, the side cover 5 can be smoothly closed by raising it in parallel with the opening 4 without rotating the side cover 5. When the side cover 5 is raised, the shaft B19 is
When the shaft reaches the upper end, the link shaft 16 rotates about the shaft B19 as a rotation fulcrum such that the axis of the shaft A18 is on the axis of the shaft B19. At this time, the locking protrusion 26 slides on the slope. The side lid 5 is pushed back by the weight of the side lid while retreating, and when the side lid 5 moves rearward in parallel and the axis of the axis A18 is located on the axis of the axis B19, the side lid 5 stops at the flange-shaped receiving portion 21, The front surface of the upper end portion is locked by the locking projection 22, and the locking projection 26 is fitted and engaged with the locked portion 23, and the opening 4 is closed.

Taking this tilt plate as an example, the frame, side lid main body, slide rail, link shaft, and stopper are separately formed of plastics of the same or different materials. As the plastic, polyethylene, polypropylene and ethylene-α-olefin copolymer are mainly used, but other known plastics are used. As the slide rail and link shaft, those excellent in wear resistance, slidability and the like are preferable. For example, nylon, acetal resin,
A fluorine resin or the like can be used. It can also be made of metal.

[0034]

The side lid mounting structure of the present invention can easily open and close the side wall opening by a combination of slight parallel movement to the front side and vertical movement parallel to the opening without rotating the side lid. Conventionally, the side cover provided at the side wall opening of the container requires extra space for opening and closing due to the rotational movement to the front side with the side cover as a radius, and the opening and closing action has been a major obstacle to traffic, work etc. However, in the present invention, the obstacle was eliminated without requiring extra space. Further, since the side lid mounting structure of the present invention has a stable engagement with the side lid closed, the opening is not easily opened even when the contents are pressed. In addition, since the front and rear surfaces of the side lid can conform to the front and rear surfaces of the side wall around the opening, it can be suitably used for the folding plate of the folding container, and can be folded and assembled without any trouble. The effect is exhibited effectively.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a container provided with a side lid mounting structure of the present invention, in which a side wall opening is closed.

FIG. 2 is a perspective view of the container of FIG. 1 with a side wall opening opened.

FIG. 3 is a side view (A) and a sectional view (B) of a slide rail according to the present invention.

FIG. 4 is a plan view (A) and a side view (B) of a link shaft in the present invention.

FIG. 5 is a cross-sectional view showing the engagement between the lock portion and the locked portion in the present invention.

FIG. 6 is a partial perspective view of an example of a folding container provided with the side lid mounting structure of the present invention.

FIG. 7 is a right half of a front side view of a tilt plate showing an example of a side cover mounting structure of the present invention.

FIG. 8 is a sectional view taken along the line AA of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 7;

10 is a front side view (right half) and a rear view (left half) of the frame of the tilt plate of FIG. 7;

11 is a sectional view taken along the line CC of FIG.

FIG. 12 is a sectional view taken along line DD of FIG. 10;

13 is a front view (right half) and a rear view (left half) of the side cover main body of the tilt plate of FIG. 7;

14A is a front view of a stopper to be incorporated into the side cover main body of FIG. 13, and FIG. 14B is a cross-sectional view taken along the line E-E.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Bottom wall 3 Side wall 4 Side wall opening 5 Side lid 6 Upper edge of opening peripheral edge 7 Lower edge 8 Same side edge 9 Slide rail 10 Guide groove 11 Hollow portion 12 Back surface 13 Ridge 14 Recess 15 Bearing part 16 Link shaft 18 Axis A 19 Axis B 20 Slide piece 21 Flange-shaped receiving part 22 Locking projection 23 Locked part 24 Slope 25 Stopper 26 Locking protruding part 27 Rod part 28 Locking projection 29 Slot 31 Frame 32 Bottom plate 33 Connecting portion 34 Side plate 35 Tilt plate 36 Frame 41 Plate 42, 43 Horizontal rib 44, 45 Vertical rib 46 Oblique hole 47 Front side plate 50 Recess

Claims (3)

(57) [Claims] 1. A mounting structure for a side lid of a container, comprising: a bottom wall, a side wall, and an opening of the side wall provided on the side wall, and a side lid capable of opening and closing the opening, the left and right edges of the peripheral edge of the opening of the side wall. A hollow slide rail with a groove is provided in the portion with the groove facing inward, and bearing portions of one of the link shafts (axis A) are provided at the left and right ends of the upper end of the side cover, and the link shaft is linked to the link portion. The shaft A comprises a shaft A having a slide piece at its end and a shaft A which is orthogonal to the link at each end and protrudes in parallel and opposite directions to each other, and the shaft A is rotatably pivoted to the bearing of the side cover. The shaft B fits the slide piece into the hollow part of the slide rail, and is rotatably and slidably engaged with the groove. When the opening of the side cover is closed, the shaft B of the link shaft is placed on the upper end of the slide rail. The slide rail and opening where the axis of axis A is located on the axis of lift axis B and the side lid faces A detachable locking mechanism is provided between the periphery of the opening and the end of the side cover so that the opening and closing of the opening can be substantially performed so as to be fitted and fixed between the upper and lower edges of the edge. A side lid mounting structure for a container, wherein the side lid is enabled by a slight movement in front of the opening and a vertical movement without rotating the side lid. 2. A locking mechanism, wherein a flange-shaped receiving portion is provided for locking the inner peripheral side of the upper, lower, left and right end portions of the side lid with a front recess structure at the peripheral edge of the opening of the side wall, and a front side of the upper edge of the peripheral edge of the opening. A locking projection for locking the front side of the upper end of the side lid projecting downward is provided, a locked portion is provided at the lower edge of the peripheral edge of the opening, and an operating portion on the outer surface side of the lower portion of the side lid is provided. 2. The side cover mounting structure according to claim 1, further comprising a lock portion having a protruding portion that can be retracted from a lower end surface of the side cover by operation. 3. The side lid mounting structure according to claim 1, wherein the container is a folding container.