JP2017065784A - Cam lock structure of container discharge port door and container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam lock structure of a container discharge port door which prevents small components from falling in a container, prevents a gap occurring between components, and prevents scrap metal from being generated by a collision between the components and contaminating a stored object.SOLUTION: Attachment means in a cam part 1 attached to a discharge port door 3a has: a cam shaft extending part 11d extending from a cam shaft 11b of a cam surface 11a and penetrating through the discharge port door 3a; a fastening part 11e formed at a front end of the cam shaft extending part 11d; and a fastening tool 12 which is fastened to the fastening part 11e from the front surface side of the discharge port door 3a. A latch part 2 has: a metal latch dock 21 fixed to a bottom plate 62 at a lower end and having a pillar shape; and a resin cover member 22 which is attached to a side surface of side surfaces of the latch dock 21 which excludes a front surface.SELECTED DRAWING: Figure 1

Description

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

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

  5 and 6 are diagrams schematically showing a conventional example of this type of container. 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 container outlet 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 leg portions 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 on the front side plate. A substantially rectangular discharge port door 3a is attached to the discharge port 3 so as to be opened and closed by a hinge mechanism on the upper edge. The hinge mechanism includes a hinge core bar 3b and a hinge bearing 3c. A cam lock structure 100 for closing and locking the discharge port door 3a in a sealed state is provided at the lower center of the discharge port door 3a. The cam lock structure 100 includes a cam portion 101 and a latch portion 102. The cam part 101 and the latch part 102 are installed in the container housing, and only the tip of the cam part 101 protrudes from the front surface of the discharge port 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 portion 102. FIG. 6 shows a state in which the discharge port door 3a is closed and locked.

  The cam portion 101 is fixed through the discharge port door 3a. The cam portion 101 includes a cylindrical boss 116 that is welded and fixed to the through hole of the discharge port door 3a and extends rearward, and a cam bolt 112 that passes through the boss 116 from the front and extends rearward. A resin bush 114 and an O-ring 115 are interposed between the boss mounting portion 112 c of the cam bolt 112 and the boss 116. A head portion 112d of the cam bolt 112 protrudes from the front surface of the discharge port door 3a and is formed with 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 the outside. A small-diameter cam mounting portion 112b (cross section is rectangular) extends behind the boss mounting portion 112c of the cam bolt 112, and a screw portion 112a is formed at the rear end.

  A cam 111 is attached to the cam mounting portion 112 b 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 includes a cam surface 111a and a stopper 111c. The cam surface 111a is a forward-facing 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 notch 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 portion 102 is fixed on the bottom plate 62. The latch portion 102 includes a metal substantially L-shaped latch dock 121 fixed to the bottom plate 62, and a resin or metal cover plate 122 attached on the rear surface of the latch dock 121.

  A protruding edge 61a that forms a discharge port on the front side plate 61 of the container protrudes forward, and this protruding edge 61a is formed at a position that can be engaged with a gasket 3d attached to the periphery of the discharge port door 3a. Yes.

  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 discharge port door 3a is just lowered and not yet locked, the cam portion 101 (that is, the discharge port door 3a) is in front of the position shown in FIG. No contact with 122. When the cam 111 is rotated in the locking direction, the cam surface 111a starts to come into contact with the cover plate 122 of the latch portion 102 from the rear cam surface 111a, and when the cam 111 is further rotated, the cam surface 111a receives force from the latch portion 102. As a result, the cam portion 101 gradually moves backward. Thereby, the discharge port door 3a is drawn toward the front side plate 61 of the container. Then, the protruding edge 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 hits 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 Publication No. 7-19192

The conventional cam lock structure of the container outlet door shown in FIG. 6 has the following problems.
Regarding the cam portion 101, the cam nut 113 that fixes the cam 111 may loosen and fall off during use of the container. In this case, there is a problem that it is difficult to find out if a relatively small cam nut 113 is mixed in the stored item. Also, the falling off of the cam nut 113 may lead to contamination of the contents.

  Further, since the joint part of the three parts of the cam 111, the cam bolt 112, and the cam nut 113 exists inside the container, if the cam nut 113 is slightly loosened, there is a risk that the contents may enter and stay in the gap between the parts. is there. Retained contents may cause contamination.

  The latch portion 102 is entirely made of metal when the cover plate 122 is made of metal, and the metal other than the cover plate 122 is made of metal even when the cover plate 122 is made of resin. When the latch portion 102 comes into contact with or collides, the chipped metal scraps may be mixed into the stored item and contaminate the stored item.

  In view of the above problems, in the cam lock structure of the container discharge port door, the present invention is such that fine parts fall off inside the container, gaps are produced between parts, or metal scraps are produced by collision between parts. The purpose is to provide something that does not have the risk of contaminating the contents.

  In order to achieve the above object, the present invention has the following configuration. The numbers in parentheses are symbols in the drawings showing examples to be described later, and are given for reference.

  A first aspect of the present invention is a cam portion (1) having a cam (11) rotatably attached to a discharge port door (3a) of a front side plate (61) in a casing of a container (C). 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) capable of pulling the discharge port door (3a) rearward by moving, the cam portion (1) serves as an attachment means for the discharge port door (3a). A camshaft extension (11d) extending forward from the camshaft (11b) through the outlet door (3a), a fastening portion (11e) at the front end of the camshaft extension (11d), and the fastening Fastened from the front side of the outlet door (3a) to the part (11e) Fastener am with (12), characterized by having a.

  According to a second aspect of the present invention, a cam portion having a cam (11) rotatably attached to a discharge port door (3a) of a front side plate (61) in a housing of a container (C) ( 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) capable of pulling the outlet door (3a) backward by moving, the latch portion (2) is a columnar metal latch whose lower end is fixed on the bottom plate (62). It has a dock (21) and the resin-made coating | coated member (22) which covers at least side surfaces other than a front surface among the side surfaces of the said latch dock (21), It is characterized by the above-mentioned.

  In the first aspect, the latch portion (2) includes a columnar metal latch dock (21) having a lower end fixed on the housing bottom surface (62), and a side surface of the latch dock (21). Of these, at least a resin-made covering member (22) covering a side surface other than the front surface may be included.

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

  The 3rd aspect of this invention is a container provided with the cam lock structure of the container discharge port door of the said 1st or 2nd aspect.

  In the present invention, in the cam lock structure of the container discharge port door, the front extension integral with the cam shaft passes through the discharge port door, and the fastening portion provided at the front end of the front extension is from the front side of the discharge port door. 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 as in the prior art. Further, since the cam, the cam shaft, and the front extension portion thereof are integral, there is no gap between them, and the contents do not enter the gap. As a result, the risk of contamination of the container contents is reduced.

  Moreover, in this invention, it has the structure which the resin-made coating | coated member covers the side surfaces other than the front surface among the side surfaces of the latch dock of a latch part in the cam lock structure of a container discharge port door. Therefore, even if the metal cam comes into contact with the rear surface of the latch portion or collides with the side surface, no metal scrap is generated. As a result, the risk of contamination of the container contents is reduced.

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 the cam lock structure in the container shown in FIG. 1, and FIGS. 2B and 2C are side views of the cam and the bolted cam head, respectively. (D) is a top view of a latch part. FIG. 3 is a schematic front view showing (a) a released state and (b) a locked state of the cam lock structure. FIG. 4 is a diagram showing a modification of the latch unit, in which (a) and (b) are the first modification, (c) and (d) are the second modification, and (e) and (f). These are a top view and a side view, respectively, of a third modification. FIG. 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. 6 (a) is a side sectional view showing the vicinity of the conventional cam lock structure in the container shown in FIG. 5, and (b) and (c) are side views of the cam nut and the cam bolt, respectively, removed. ) Is a plan view of the latch portion.

Embodiments of the present invention will be described below with reference to the drawings illustrating an embodiment of the present invention.
1 and 2 are diagrams schematically showing an embodiment of a container to which the present invention is applied.

  FIG. 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 container outlet 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 casing 6 made of a stainless steel four-side plate, a bottom plate, and an upper plate, and leg portions 5 attached to the bottom plate bottom 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 portion of the front side plate. A substantially rectangular discharge port door 3a is attached to the discharge port 3 so as to be opened and closed by a hinge mechanism on the upper edge. The hinge mechanism includes a hinge core bar 3b and a hinge bearing 3c. A cam lock structure 10 for closing the discharge port door 3a and locking it in a sealed state is provided at the lower center of the discharge port 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 discharge port door 3a.

  With reference to FIG. 2, the outline | summary of the cam lock structure 10 of one Example of this invention is demonstrated. 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 a side view and a bolt view of the cam 11 removed, respectively. FIG. 3 is a developed side view of the cam head 12, and (d) is a plan view of the latch portion 2. FIG. 2 shows a state in which the discharge port door 3a is closed and locked.

  The cam portion 1 passes through the discharge port door 3a and is attached to the discharge port door 3a. Similar to the conventional example, the cam portion 1 includes a cylindrical boss 16 which is welded and fixed to the periphery of a through hole formed in the discharge port door 3 a and extends rearward, and a resin bush 14 disposed inside the boss 16. And an O-ring 15. Similarly to the conventional example, the cam 11 included in the cam portion 1 includes a cam shaft 11 extending perpendicularly to the discharge port door 3a, and is attached so that the cam shaft 11 can rotate. 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 that shields the inside and the outside of the container.

  In the present invention, as a means for attaching the cam 11, a cam shaft extension portion 11d extending forward from the cam shaft 11b of the cam 11 and a fastening portion 11e formed at the front end thereof are provided. The cam shaft extension 11d passes through the boss 16, the bush 14 and the O-ring 15, and the front end appears on the front surface of the discharge port door 3a. In the illustrated example, the fastening portion 11e is a screw hole. In the illustrated example, the 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 passes through a substantially cylindrical head portion 12c and is screwed together. The tip of the screw part of the bolt 12a protrudes from the rear surface of the head part 12c. A hexagonal hole 12b is formed in the front surface of the head portion 12c of the cam head 12 with the bolt. The hexagonal hole 12b is used to mount 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 has a cam shaft 11b having a substantially spiral cam surface 11a and a stopper 11c formed around the shaft, a cam shaft extension portion 11d, and a fastening portion 11e at the front end thereof. This is the member. If the fastener 12 outside the container loosens and falls off, the cam 11 falls off inside the container, but it is a relatively large member, so it is easy to find the dropped member.

  As another example, conversely to the example of FIG. 2, a screw hole may be formed using the fastening portion 11 e at the front end of the cam shaft extension portion 11 d as a screwed rod 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 front-facing surface formed in a substantially spiral shape from the rear end to the front end of the cam shaft 11b, but a notch portion that does not form the cam surface 11a is within a predetermined range around the shaft. is there. The stopper 11c protrudes forward from the peripheral edge of the front end of the cam surface 11a.

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

  The covering member 22 serves as a cushioning material against the contact, sliding, and collision of the cam 11 with the latch portion 2. Thereby, it is possible to prevent metal scraps from being generated from the metal portions of the cam 11 and the latch dock 21. In the illustrated example, the covering member 22 is cylindrical and covers the entire side surface of the latch dock 21. Further, it is preferable that the upper end of the covering member 22 is located 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 a resin excellent in slidability, wear resistance, and impact resistance. For example, ultrahigh molecular weight polyethylene is suitable, but is not limited thereto.

  As shown in FIG. 2A, a protruding edge 61a that forms a discharge port in the front side plate 61 of the container protrudes forward, and this protruding edge 61a is a gasket 3d attached to the periphery of the discharge port door 3a. It is formed in the position which can be engaged. In the locked state, the discharge port door 3a is pulled backward, and the protruding edge portion 61a is buried in the gasket 3d. As a result, the sealed state is maintained.

  FIG. 3 is a schematic front view showing (a) the released state and (b) the 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. 3 (a), 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 positioned in front of the notch 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 discharge port door 3a and the cam portion 1 as a whole are in front of the position shown in FIG. 2, and the protruding edge portion 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 arrow), the cam surface 11a on the rear end side comes into contact with the rear surface of the covering member 22 of the latch portion 2, and the covering member 22 Start sliding on the surface. Thereafter, when the cam surface 11a is further rotated, the cam surface 11a gradually receives the force from the latch portion 2 so that the cam portion 1 gradually moves rearward. As a result, the discharge port door 3a is pulled backward.

  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 be rotated any further. This state is the locked state shown in FIG. At this time, as shown in FIG. 2, the protruding edge 61a of the front side plate 61 is pressed so as to be buried in the gasket 3d, and a sealed state is formed.

  FIG. 4 is a diagram showing a modification of the latch unit 2, (a) and (b) are the first modification, (c) and (d) are the second modification, and (e) and (f) are It is a top view and a side view, respectively, of a third modification.

  In the latch portion 2A of the first modification, the covering member 22 partially covers the side surface of the cylindrical latch dock 21. 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 omit the covering member. Therefore, the covering member 22 is mounted so as to cover at least a 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 portion 2C of the third modified example, 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 modifications of the latch unit shown in FIG. 2 and the latch unit shown in FIG. 4 can be applied in appropriate combination.

  The present invention is not limited to the above-described embodiments, and various modifications can be made.

DESCRIPTION OF SYMBOLS 10 Cam lock structure 1 Cam part 11 Cam 11a Cam surface 11b Cam shaft 11c Stopper 11d Cam shaft extension part 11e Screw hole 12 Cam head with bolt 12a Screw part 12b Hexagonal hole 14 Bush 15 O-ring 16 Boss 2 Latch part 21 Latch dock 22 Cover member DESCRIPTION OF SYMBOLS 3 Outlet 3a Outlet door 3b Hinge core rod 3c Hinge bearing 3d Gasket 4 Inlet 5 Leg part 6 Container housing 61 Front side plate 61a Protruding edge 62 Bottom plate C Container 110 Cam lock structure 101 Cam part 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 Hexagonal hole 113 Cam nut 114 Bush 115 O-ring 116 Boss 102 Latch part 21 latch dock 122 covering plate C0 container

Claims (6)

In the housing of the container (C), a cam portion (1) having a cam (11) rotatably attached to a discharge port door (3a) of a front side plate (61), and a bottom plate (62) A latch portion (2) that is fixed, and the spiral cam surface (11a) of the cam (11) rotates while abutting against the rear surface of the latch portion (2), thereby causing the discharge door ( In the cam lock structure (10) capable of pulling 3a) backward,
The cam shaft extension portion that extends through the discharge port door (3a) forward from the cam shaft (11b) of the cam (11) as an attachment means for the discharge port door (3a). (11d), a fastening part (11e) at the front end of the camshaft extension part (11d), and a fastener fastened from the front side of the outlet door (3a) to the fastening part (11e) ( And 12) a cam lock structure for a container outlet door. In the housing of the container (C), a cam portion (1) having a cam (11) rotatably attached to a discharge port door (3a) of a front side plate (61), and a bottom plate (62) A latch portion (2) that is fixed, and the spiral cam surface (11a) of the cam (11) rotates while abutting against the rear surface of the latch portion (2), thereby causing the discharge door ( In the cam lock structure (10) capable of pulling 3a) backward,
The latch part (2) covers at least a side surface other than the front surface among the columnar metal latch dock (21) whose lower end is fixed on the bottom plate (62) and the side surface of the latch dock (21). A container lock door cam lock structure, comprising: a resin covering member (22).   The latch part (2) is a columnar metal latch dock (21) whose lower end is fixed on the bottom surface (62) of the housing, and at least a side surface other than the front surface among the side surfaces of the latch dock (21). And a cover member (22) made of resin covering the container. The cam lock structure of the container outlet door according to claim 1,   The container outlet door according to claim 1 or 3, wherein the fastening portion (11e) is a screw hole or a screw-attached rod, and the fastener (12) is a bolt or a nut corresponding thereto. Cam lock structure.   The cam lock structure for a container discharge port door according to claim 2 or 3, wherein the covering member (22) covers the entire side surface of the latch dock (21).   The container provided with the cam lock structure of the container discharge port door in any one of Claims 1-5.

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