JP6655931B2 - Container exit door cam lock structure and container - Google Patents

Description

  The present invention relates to a cam lock structure for locking a container discharge door.

  BACKGROUND ART A container made of stainless steel is known as a container for storing, transporting, and mixing various powders (for example, Patent Document 1).

  5 and 6 are views schematically showing a conventional example of this type of container. FIG. 5A is a front view of a conventional container C0, FIG. 5B is a left side view, and FIG. 5C is an enlarged view of a portion surrounded by a chain line in FIG. In the following description, the side surface with the outlet of the container is referred to as the front surface, and the opposite side surface is referred to as the rear surface.

  As shown in FIG. 5, the container C0 includes a rectangular parallelepiped container housing 6 composed of a stainless steel four-side plate, a bottom plate, and an upper plate, and legs 5 attached to the bottom plate lower surface. An inlet 4 with a lid is provided in the center of the upper plate, and an outlet 3 is provided in the front side plate. A substantially rectangular outlet door 3a is attached to the outlet 3 so as to be openable and closable by a hinge mechanism at an upper edge. The hinge mechanism includes a hinge core rod 3b and a hinge bearing 3c. A cam lock structure 100 for closing and locking the outlet door 3a in a sealed state is provided at the lower center of the outlet door 3a. The cam lock structure 100 includes a cam portion 101 and a latch portion 102. The cam portion 101 and the latch portion 102 are installed in the container housing, and only the tip of the cam portion 101 protrudes from the front surface of the discharge door 3a.

  The outline of the conventional cam lock structure 100 will be described with reference to FIG. 6A is a side sectional view showing the vicinity of the conventional cam lock structure in the container C0 shown in FIG. 5, and FIGS. 6B and 6C are side views of the removed cam nut 113 and cam bolt 112, respectively. (D) is a plan view of the latch unit 102. FIG. 6 shows a state in which the outlet door 3a is closed and locked.

  The cam part 101 is fixed so as to penetrate the outlet door 3a. The cam portion 101 includes a cylindrical boss 116 welded and fixed to a through hole of the outlet door 3a and extending rearward, and a cam bolt 112 penetrating the boss 116 from the front and extending rearward. A bush 114 and an O-ring 115 made of resin are interposed between the boss mounting portion 112c of the cam bolt 112 and the boss 116. The head portion 112d of the cam bolt 112 protrudes from the front surface of the outlet door 3a and has a hexagonal hole 112e. As another example of the head portion 112d, there is a T-bar handle type or a hexagonal column shape instead of the hexagonal hole 112e. The head portion 112d is used for rotating the cam bolt 112 from outside. A small-diameter cam mounting portion 112b (having a rectangular cross section) extends behind the boss mounting portion 112c of the cam bolt 112, and a screw portion 112a is formed at the rear end.

  The cam 111 is attached to the cam mounting portion 112b of the cam bolt 112. The cam mounting portion 112b penetrates the cam shaft 111b. Further, the cam 111 is fixed to the cam bolt 112 by fastening the cam nut 113 to the screw portion 112 a of the cam bolt 112. The cam 111 has a cam surface 111a and a stopper 111c. The cam surface 111a is a front surface formed in a substantially spiral shape from the rear end to the front end of the cam shaft 111b. Within a predetermined range around the axis of the cam shaft 111b, there is a cutout portion without the cam surface 111a. The stopper 111c protrudes forward from the peripheral edge of the front end of the cam surface 111a.

  The latch section 102 is fixed on the bottom plate 62. The latch unit 102 includes a metal substantially L-shaped latch dock 121 fixed to the bottom plate 62, and a resin or metal covering plate 122 mounted on the rear surface of the latch dock 121.

  A projecting edge portion 61a forming a discharge port on the front side plate 61 of the container projects forward, and this projecting edge portion 61a is formed at a position where it can be engaged with a gasket 3d attached to a peripheral edge of the discharge port door 3a. I have.

  In such a configuration, when the cam bolt 112 is rotated using the head portion 112d, the cam 111 can be rotated. In a state where the outlet door 3a is merely lowered and not yet locked, the cam portion 101 (that is, the outlet door 3a) is located forward of the position shown in FIG. No contact with 122. When the cam 111 is rotated in the locking direction, the cam surface 111a on the rear end side comes into contact with the cover plate 122 of the latch portion 102, and when further rotated, the cam surface 111a receives a force from the latch portion 102. As a result, the cam portion 101 gradually moves rearward. As a result, the discharge door 3a is drawn toward the front side plate 61 of the container. Then, the protruding edge portion 61a of the front side plate 61 is pressed so as to be buried in the gasket 3d, and a sealed state is formed. When the stopper 111c finally contacts the side surface of the latch portion 102, the cam 111 cannot rotate any further. This state is the locked state shown in FIG.

Japanese Utility Model Laid-Open No. 7-19192

The conventional cam lock structure of the container discharge door shown in FIG. 6 has the following problems.
As for the cam part 101, the cam nut 113 fixing the cam 111 may come loose and fall off during use of the container. In this case, if the relatively small cam nut 113 is mixed in the container, there is a problem that it is difficult to detect the cam nut 113. Also, the falling off of the cam nut 113 may lead to contamination of the contents.

  In addition, since the three parts of the cam 111, the cam bolt 112, and the cam nut 113 are joined to each other in the container, if the cam nut 113 is slightly loosened, the contents may enter the gap between the parts and stay there. is there. Stored contents may cause contamination.

  The latch portion 102 is entirely made of metal when the covering plate 122 is made of metal, and is also made of metal except for the covering plate 122 when the covering plate 122 is made of resin. If the latch portion 102 comes into contact with or collides with the latched metal chips, the chipped metal dust may be mixed into the stored item and contaminate the stored item.

  In view of the above problems, the present invention relates to a cam lock structure of a container discharge door, in which small parts are dropped inside a container, a gap is formed between parts, and metal dust is generated due to collision between parts. It is an object of the present invention to provide an object that does not have a risk of contaminating the contents.

  In order to achieve the above object, the present invention has the following configuration. The numbers in parentheses are the reference numerals in the drawings showing the embodiments described later, and are attached for reference.

  According to a first aspect of the present invention, in a container of a container (C), a cam portion (11) having a cam (11) rotatably attached to an outlet door (3a) of a front side plate (61). 1) and a latch portion (2) fixed to the bottom plate (62), and the spiral cam surface (11a) of the cam (11) rotates while contacting the rear surface of the latch portion (2). In the cam lock structure (10) which can draw the outlet door (3a) backward by moving, the cam portion (1) serves as a mounting means for the outlet door (3a). A cam shaft extension (11d) extending forward from the cam shaft (11b) through the outlet door (3a); a fastening portion (11e) at a front end of the cam shaft extension (11d); Part (11e) is fastened from the front side of the outlet door (3a). Fastener am with (12), characterized by having a.

  In the first aspect, the latch portion (2) may include a column-shaped metal latch dock (21) having a lower end fixed on the housing bottom surface (62), and a side surface of the latch dock (21). And a resin covering member (22) covering at least a side surface other than the front surface.

In the first aspect, the fastening portion (11e) may be a screw hole or a threaded rod, and the fastener (12) may be a corresponding bolt or nut.
In the first aspect, the covering member (22) may cover the entire side surface of the latch dock (21).

A second aspect of the present invention is the container according to the first aspect, including the cam lock structure of the container discharge door.

  According to the present invention, in the cam lock structure of the container discharge door, the front extension integrated with the cam shaft penetrates the discharge door, and the fastening portion provided at the front end of the front extension extends from the front side of the discharge door. The fastener has a configuration in which the fastener is fastened. Therefore, since there is no fastening element for fixing the cam inside the container, the cam nut does not fall into the container unlike the prior art. In addition, since the cam, the camshaft, and the front extension thereof are integrated, there is no gap between them, and there is no intrusion of the contents into the gap. As a result, the risk of contamination of the container contents is reduced.

  Also, in the present invention, in the cam lock structure of the container discharge door, at least one of the side surfaces of the latch dock of the latch portion other than the front surface is covered with a resin covering member. Therefore, even if the metal cam contacts the rear surface of the latch portion or collides with the side surface, no metal chips are generated. As a result, the risk of contamination of the container contents is reduced.

FIG. 1A is a front view of a container according to an embodiment of the present invention, FIG. 1B is a left side view, and FIG. 1C is an enlarged view of a portion surrounded by a chain line in FIG. 2A is a schematic side sectional view showing the vicinity of a cam lock structure in the container shown in FIG. 1, and FIGS. 2B and 2C are side views of a removed cam and a cam head with a bolt, respectively. (D) is a plan view of the latch section. FIG. 3 is a schematic front view showing the (a) released state and the (b) locked state of the cam lock structure. FIGS. 4A and 4B are diagrams showing a modification of the latch unit, wherein FIGS. 4A and 4B show the first modification, FIGS. 4C and 4D show the second modification, and FIGS. FIG. 9 is a plan view and a side view of a third modified example. 5A is a front view of a conventional container, FIG. 5B is a left side view, and FIG. 5C is an enlarged view of a portion surrounded by a chain line in FIG. FIG. 6A is a side sectional view showing the vicinity of the conventional cam lock structure in the container shown in FIG. 5, and FIGS. 6B and 6C are side views of the removed cam nut and cam bolt, respectively. () Is a plan view of the latch unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing an embodiment of the present invention.
1 and 2 are diagrams schematically showing one embodiment of a container to which the present invention is applied.

  1A is a front view of a container C according to an embodiment of the present invention, FIG. 1B is a left side view, and FIG. 1C is an enlarged view of a portion surrounded by a chain line in FIG. In the following description, the side surface with the outlet of the container is referred to as the front surface, and the opposite side surface is referred to as the rear surface.

  As shown in FIG. 1, the container C includes a rectangular parallelepiped container housing 6 composed of a stainless steel four-side plate, a bottom plate, and an upper plate, and a leg 5 attached to the bottom plate lower surface. An inlet 4 with a lid is provided at the center of the upper plate, and an outlet 3 is provided at the lower part of the front side plate. A substantially rectangular outlet door 3a is attached to the outlet 3 so as to be openable and closable by a hinge mechanism at an upper edge. The hinge mechanism includes a hinge core rod 3b and a hinge bearing 3c. A cam lock structure 10 for closing the outlet door 3a and locking it in a sealed state is provided at the lower center of the outlet door 3a. The cam lock structure 10 includes a cam portion 1 and a latch portion 2. The cam portion 1 and the latch portion 2 are basically installed inside the container housing 6, but only the front end of the cam portion 1 protrudes from the front surface of the outlet door 3a.

  An outline of the cam lock structure 10 according to one embodiment of the present invention will be described with reference to FIG. 2A is a schematic side sectional view showing the vicinity of the cam lock structure 10 in the container C shown in FIG. 1, and FIGS. 2B and 2C are side views of the removed cam 11 and bolts. FIG. 4 is a developed side view of the cam head 12, and FIG. 4D is a plan view of the latch unit 2. FIG. 2 shows a state in which the outlet door 3a is closed and locked.

  The cam portion 1 is attached to the outlet door 3a through the outlet door 3a. As in the conventional example, the cam portion 1 includes a cylindrical boss 16 welded and fixed to the periphery of a through hole formed in the discharge port door 3a and extending rearward, and a resin bush 14 disposed inside the boss 16. And an O-ring 15. Further, similarly to the conventional example, the cam 11 of the cam portion 1 includes a cam shaft 11 extending perpendicularly to the discharge port door 3a, and the cam shaft 11 is attached so as to be rotatable. The boss 16 is a shaft hole reinforcing member, the bush 14 is a bearing member, and the O-ring 15 is a sealing material for shielding the inside and outside of the container.

  In the present invention, the cam 11 has a cam shaft extension 11d extending forward from the cam shaft 11b of the cam 11 and a fastening portion 11e formed at the front end thereof. The camshaft extension 11d penetrates the boss 16, the bush 14, and the O-ring 15, and its front end appears on the front surface of the outlet door 3a. In the illustrated example, the fastening portion 11e is a screw hole. In the illustrated example, a bolt 12a of the bolted cam head 12 as a fastener is fastened to the screw hole 11e. The bolted cam head 12 is fastened from the front side of the outlet door 3a and is outside the container housing.

  The bolted cam head 12 is a member in which a bolt 12a penetrates a substantially cylindrical head portion 12c and is integrally screwed. The tip of the screw portion of the bolt 12a protrudes from the rear surface of the head portion 12c. A hexagonal hole 12b is formed on the front surface of the head portion 12c of the cam head 12 with bolts. The hexagonal hole 12b is for mounting a tool for rotating the cam shaft 11b. As another example, instead of the hexagonal hole 12b, a hexagonal column protruding to the outside may be used, or a T-bar handle type may be used.

  As shown in FIG. 2C, the cam 11 includes a cam shaft 11b having a substantially spiral cam surface 11a and a stopper 11c formed around the axis, a cam shaft extension 11d, and a fastening portion 11e at the front end thereof. It is the member which became. If the fastener 12 outside the container is loosened and falls off, the cam 11 falls inside the container, but since it is a relatively large member, it is easy to find the dropped member.

  As another example, contrary to the example in FIG. 2, a screw hole may be formed by using the fastening portion 11 e at the front end of the cam shaft extension 11 d as a rod with a screw and the fastener 12 as a cam nut. The fastening means for fixing the cam 11 is not limited to these examples, and various forms are possible.

  The cam surface 11a and the stopper 11c are the same as in the conventional example. The cam surface 11a is a forward-facing surface formed in a substantially spiral shape from the rear end to the front end of the cam shaft 11b, but a notched portion without the cam surface 11a is formed within a predetermined range around the axis. is there. The stopper 11c protrudes forward from the periphery of the front end of the cam surface 11a.

  The latch unit 2 is fixed on a bottom plate 62 of the container housing. The latch unit 2 includes a metal latch dock 21 having a columnar shape, and a resin covering member 22 covering a side surface of the latch dock 21. The latch dock 21 is preferably columnar, and has a lower end welded and fixed on the bottom plate 62. In the illustrated example, the latch dock 21 is a column.

  The covering member 22 plays a role of a cushioning material against contact, sliding and collision of the cam 11 with the latch portion 2. Thereby, it is possible to prevent the generation of metal chips from the metal parts of the cam 11 and the latch dock 21. In the illustrated example, the covering member 22 has a cylindrical shape and covers the entire side surface of the latch dock 21. It is preferable that the upper end of the covering member 22 is located at a position slightly higher than the upper end of the latch dock 21. The thickness of the covering member 22 is, for example, about 3 to 8 mm, but is not limited to this range. The covering member 22 is preferably made of a resin having excellent slidability, abrasion resistance and impact resistance. For example, ultra-high molecular weight polyethylene is suitable, but not limited thereto.

  As shown in FIG. 2A, a projecting edge 61a forming a discharge port on the front side plate 61 of the container protrudes forward, and the projecting edge 61a is a gasket 3d attached to a peripheral edge of the discharge port door 3a. Is formed at a position where it can be engaged. In the locked state, the discharge port door 3a is drawn rearward, and the protruding edge 61a is buried in the gasket 3d. Thereby, the sealed state is maintained.

  FIG. 3 is a schematic front view showing the (a) released state and the (b) locked state of the cam lock structure 10. FIG. 2 described above corresponds to the locked state of FIG.

  In the released state of FIG. 3A, the outlet door (not shown) has just been lowered so as to cover the outlet and is not yet locked. The latch portion 2 is located in front of the cutout portion 11f of the cam surface 11a, and the cam surface 11a is not in contact with the latch portion 2. In this state, the outlet door can be opened. Although the side view of the released state of FIG. 3A is not shown, the entire discharge door 3a and the cam portion 1 are located forward of the position shown in FIG. 2, and the protruding edge 61a is not buried in the gasket 3d. .

  When the cam 11 is rotated in the locking direction from the released state of FIG. 3A (see the arrow), the cam surface 11a on the rear end side contacts the rear surface of the covering member 22 of the latch portion 2, and Start sliding on the surface. Thereafter, when the cam surface 11a is further rotated, the cam surface 11a receives a force from the latch portion 2, and the cam portion 1 gradually moves rearward. As a result, the outlet door 3a is pulled rearward.

  Finally, as shown in FIG. 3B, when the stopper 11c hits the side surface of the covering member 22 of the latch portion 2, the cam 11 cannot rotate any more. This state is the locked state shown in FIG. At this time, as shown in FIG. 2, the protruding edge portion 61a of the front side plate 61 is pressed so as to be buried in the gasket 3d, and a sealed state is formed.

  FIGS. 4A and 4B are diagrams showing a modification of the latch unit 2, wherein FIGS. 4A and 4B show a first modification, FIGS. 4C and 4D show a second modification, and FIGS. It is a top view and a side view of a 3rd modification, respectively.

  In the latch section 2A of the first modified example, the side surface of the cylindrical latch dock 21 is partially covered by the covering member 22. Since it is considered that the cam does not contact or collide with the front surface of the latch portion 2A, the front surface may not include the covering member. Therefore, the covering member 22 is attached so as to cover at least the side surface other than the front surface among the side surfaces of the latch dock 21.

  In the latch portion 2B of the second modification, the latch dock 21 has a prismatic shape, and the entire side surface is covered with the covering member 22. In the above example, the upper surface of the latch dock 21 is not covered with the covering member 22. On the other hand, in the latch section 2C of the third modification, the entire side surface and the entire upper surface of the latch dock 21 are covered with the covering member 22. The features of the first to third modified examples of the latch unit shown in FIG. 2 and the latch unit shown in FIG. 4 can be applied in appropriate combinations.

  The present invention is not limited to the embodiments described above, and various modifications are possible.

Reference Signs List 10 cam lock structure 1 cam portion 11 cam 11a cam surface 11b cam shaft 11c stopper 11d cam shaft extension portion 11e screw hole 12 bolted cam head 12a screw portion 12b hexagon hole 14 bush 15 O-ring 16 boss 2 latch portion 21 latch dock 22 covering member Reference Signs List 3 outlet 3a outlet door 3b hinge core rod 3c hinge bearing 3d gasket 4 inlet 5 leg 6 container housing 61 front side plate 61a protruding edge 62 bottom plate C container 110 cam lock structure 101 cam portion 111 cam 111a cam surface 111b cam Shaft 111c Stopper 112 Cam bolt 112a Screw part 112b Cam mounting part 112c Boss mounting part 112d Head part 112e Hexagon hole 113 Cam nut 114 Bush 115 O-ring 116 Boss 102 Latch part 21 latch dock 122 covering plate C0 container

Claims (5)

In the housing of the container (C), a cam portion (1) having a cam (11) rotatably attached to an outlet door (3a) of a front side plate (61) and a bottom plate (62). A fixed latch portion (2), and a spiral cam surface (11a) of the cam (11) is rotated while abutting against a rear surface of the latch portion (2), so that the discharge port door ( 3a) in a cam lock structure (10) that can be pulled rearward,
The cam portion (1) extends from the cam shaft (11b) of the cam (11) forward through the discharge door (3a) as attachment means for the discharge door (3a). (11d), a fastening part (11e) at the front end of the camshaft extension part (11d), and a fastening tool (fastener) fastened to the fastening part (11e) from the front side of the outlet door (3a). 12), a cam lock structure of the container outlet door.   The latch portion (2) has a columnar metal latch dock (21) having a lower end fixed on the housing bottom surface (62), and at least a side surface other than the front surface among the side surfaces of the latch dock (21). The cam lock structure for a container discharge door according to claim 1, further comprising: a resin covering member (22) covering the cover. 3. The container discharge door according to claim 1, wherein the fastening portion (11 e) is a screw hole or a threaded bar, and the fastener (12) is a corresponding bolt or nut. Cam lock structure. The cam lock structure of a container discharge door according to claim 2 , wherein the covering member (22) covers the entire side surface of the latch dock (21). A container provided with a cam lock structure for a container discharge door according to any one of claims 1 to 4 .

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