JP3406476B2 - Temporary capping device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap temporary tightening device, and more particularly to a cap temporary tightening device for securely temporarily tightening a screw-type cap to the mouth portion of a container.

[0002]

2. Description of the Related Art Of containers that are continuously transported on a line,
Various cap screwing devices have been proposed for screwing screw-on caps into the threaded mouth portion. For example, first, a screw cap is put on the mouth portion of the container in which the screw thread is formed, or a screw cap is put on the mouth portion of the container and further lightly screwed in. There is a cap screwing device that performs a final tightening of a screw cap with a predetermined torque by using the cap screwing device. As a cap temporary tightening device for performing the above-mentioned temporary tightening, the top surface of the cap placed at the mouth of the container conveyed on the line is arranged above the conveying line and is springed downward. While pushing the container toward the mouth of the container by the biased plate-shaped member, the container is conveyed along the conveying line while the outer peripheral surface of the cap is in contact with the temporary fastening member extending along the container conveying direction. A cap temporary tightening device has been proposed in which a screw type cap is rotated with respect to a container by the contact between the temporary tightening members to temporarily tighten the cap.

[0003]

In this cap temporary tightening device, when a container having a cap on its mouth is conveyed to the lower side of the plate member along the line, first, the mouth of the container is moved to the mouth. The downstream end (front end) of the placed cap in the container transport direction comes into contact with the downstream end of the plate-shaped portion that is spring-biased in the container transport direction. Due to this contact, only the front end portion of the cap is pushed down, and the cap, which is covered substantially horizontally with respect to the mouth portion of the container, may be in a state where the front end side is lowered above the mouth portion of the container. . As a result, even if the cap comes into contact with the temporary fastening member and rotates with respect to the container, the screw thread formed inside the cap does not mesh well with the screw thread formed at the mouth portion of the container, and Tightening cannot be done, or the cap is screwed into the container while tilted with respect to the mouth part and temporarily tightened, resulting in incomplete sealing with the container mouth part. There is a problem that ends up.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cap temporary tightening device capable of reliably performing temporary tightening of a cap.

[0005]

The object of the present invention is to:
A cap temporary tightening device for temporarily tightening a screw-on cap placed on a mouth portion of a container conveyed on a line to the mouth portion, extending along the line, and covering the mouth portion. A temporary fastening member that contacts the outer peripheral surface of the cap, a lower member that extends along the line and that supports both lower end portions of the cap that covers the mouth portion of the container in the container transport direction, and from the lower member Centered on a horizontal axis extending in a direction orthogonal to the container transport direction, having an upper member that extends substantially parallel to the lower member at a distance slightly larger than the height of the cap and that can come into contact with the upper end of the cap. A swing guide that is swingable in the vertical direction and a cap position correcting means that shifts the cap being transported outside a predetermined region into a predetermined region are provided, and the horizontal axis is the container transport direction of the swing guide. of It is achieved by the cap temporary tightening device, characterized in that provided in the flow side.

[0006]

According to the swing guide of the present invention, since it is swingable in the vertical direction about the horizontal axis provided in the upstream portion in the container transport direction and extending in the direction orthogonal to the container transport direction, it is possible to swing the container vertically. It is possible to securely perform the temporary tightening of the caps while maintaining the caps at different height positions in a substantially horizontal state. According to the present invention, the cap put on the mouth portion of the container is prior to contact with the temporary fastening member,
Both sides of the lower end are supported by the lower member of the swing guide. Further, the upper member provided at a distance slightly larger than the cap height from the lower member of the swing guide allows the cap to be substantially horizontally covered on the mouth portion of the container. When the cap is not substantially horizontal and is located outside the predetermined region, that is, when the cap covers the mouth portion of the container with a large inclination, the cap position correcting means presses the cap downward to make the cap substantially horizontal. The cap is prevented from tilting with respect to the mouth portion of the container due to contact with the temporary fastening member or the like. That is, the cap has its lower end both sides supported by the lower member of the swing guide, and the inclination of the upper part of the swing guide is corrected so that the cap is temporarily tightened while being kept substantially horizontal to the mouth portion. Will be done.

Further, in this type of device, a screw thread formed on the inner circumference of the cap when the cap put on the mouth portion of the container comes into contact with the upstream end of the temporary fastening member in the container transport direction. The relative positional relationship with the threads formed on the mouth of the container is not constant. Therefore, as soon as the rotation of the cap starts, the start end of the screw thread of the cap and the start end of the screw thread of the mouth portion of the container are not always engaged and the temporary tightening is not started. For example, in the case of a double-threaded screw with the cover on the mouth part, after idling 180 °, the start end of the screw thread of the cap engages with the start end of the screw thread of the mouth part of the container to start temporary tightening. There are also cases. Therefore, the height position of the cap with respect to the mouth portion of the container is different for each container conveyed on the line.

Therefore, on the upstream side of the swing guide,
If the starting end of the screw thread of the cap and the starting end of the screw thread of the mouth part of the container are not engaged, that is, the cap is substantially horizontal but is lifted by the swing guide and is outside the predetermined area, It is possible to prevent the position correcting means from pressing the cap downward and pushing it into the mouth portion of the container, causing the cap to idle and the temporary tightening to become defective.

[0009]

In a preferred embodiment of the present invention, the cap position correcting means is rotatably mounted in the container conveying direction and is spring-biased toward the top of the cap that covers the mouth of the container. Composed by.
According to this embodiment, since the cap is corrected by the cap position correcting means, which is a roller, the cap position correcting means does not hinder the conveyance of the cap and the cap can be securely tightened temporarily. In another preferred aspect of the present invention, a downward convex portion is provided on the back surface of the upper member of the swing guide. In another preferred embodiment, a sliding sheet having a friction coefficient smaller than that of metal is arranged on the back surface of the upper member of the swing guide. In these embodiments, the contact friction between the cap and the swing guide is reduced, and the temporary tightening of the cap can be smoothly performed.

In another preferred embodiment of the present invention, a holding guide member for holding the cap in a predetermined region in the upward direction is connected to the downstream side of the swing guide. Further, in another preferred embodiment, a holding guide member for holding the cap in a predetermined region in the left-right direction is continuously provided on the downstream side of the swing guide. In these embodiments, when the cap is not temporarily tightened sufficiently, it is possible to prevent the cap from falling off from the container mouth portion in the transport direction when the cap advances from the swing guide, and the cap is dropped. You can

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic plan view of a cap temporary tightening device according to a preferred embodiment of the present invention, and FIG.
FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1. As shown in FIGS. 1 and 2, the cap temporary tightening device of the present embodiment separates the temporary tightening member 1 arranged along the transfer line L along which the container B is continuously transferred from the transfer line L from each other. 3, a holding member 2 arranged so as to face the temporary fastening member 1, a plurality of suction ports 3 opened at a position below the temporary fastening member 1, and an upstream side of the temporary fastening member 1 in the container transport direction. The guide means 4 is provided. In this embodiment, the container B is a so-called PET bottle that is filled with liquid food such as soft drink and mineral water, and has a spiral protrusion (screw) formed on the outer periphery of the mouth portion provided at the top. Also, the cap 5 to be temporarily tightened is a synthetic resin screw-in type with a bottomed cylinder whose one end is open and has a screw thread that can be screwed into the screw thread at the mouth of the container. It is a cap. The screw thread formed on the mouth portion of the container B and the screw thread formed on the inner peripheral surface of the cap 5 rotate the cap 5 with respect to the container B in the clockwise direction, so that the cap 5 is It is formed so as to be screwed or screwed into the mouth of B.

In this embodiment, the container B has a flange f formed on the neck portion in a state where the cap 5 is placed on the mouth portion, that is, the cap 5 is not screwed on the mouth portion.
Hooked on a pair of rails 6 (not shown in FIG. 1),
It is transported to the cap temporary tightening device. Further, fine projections or teeth extending outward are formed at substantially equal intervals on the entire outer peripheral surface of the cap 5. This tooth
The cap 5 extends over substantially the entire length in the height direction.
FIG. 3 is an explanatory diagram showing the relationship between the temporary tightening member 1 of the cap and the cap put on the mouth portion of the container B on the transport line L. As shown in FIG. 3, the temporary fastening member 1 is a plate-shaped member arranged along the transport line L, and has a temporary fastening surface 1 a facing the transport line L. The temporary tightening surface 1a has a length along the transport direction of the container B indicated by the arrow a that is sufficient to allow the cap 5 to be temporarily tightened by rotating the cap 5, and the outer peripheral surface of the cap 5 A plurality of fine protrusions or teeth extending in the up-and-down direction that can mesh with the teeth formed on the whole are formed over the whole. The spacing between the teeth formed on the temporary tightening surface 1a is
At the upstream side of the temporary fastening surface 1a in the container transport direction, the gap between the teeth formed on the outer periphery of the cap 5 is approximately twice, and at the downstream side of the temporary fastening surface 1a in the container transport direction, the cap 5 is formed. It is about four times the distance between the teeth formed on the outer circumference of the. Here, the upstream portion of the temporary fastening surface 1a in the container transport direction is approximately equal to the outer circumference of the cap from the upstream end of the temporary fastening surface 1a in the container transport direction, or 4 / of the outer circumference of the cap.
It refers to a part with a length of about 5.

The temporary fastening member 1 is temporarily fastened so that the teeth formed on the temporary fastening surface 1a mesh with the teeth formed on the outer peripheral surface of the cap 5 which covers the mouth portion of the container B being conveyed. The surface 1a is arranged at a height position such that the surface 1a comes into contact with the outer peripheral surface of the cap 5 which covers the mouth portion of the container conveyed along the conveyance line L. The temporary tightening member 1 is movable so as to be able to move toward and away from the transport line L, and as shown in FIG. It is configured to be urged in the direction, that is, toward the cap 1 that covers the mouth portion of the transported container, and the temporary fastening surface 1 a is pressed toward the outer peripheral surface of the cap 1.

The holding member 2 disposed at a position facing the temporary fastening member 1 across the transfer line L has a holding surface 2a on the transfer line L side, which is a cap put on the mouth of the container to be transferred. It is arranged at a height position so as to come into contact with the outer peripheral surface of 5. The space between the temporary fastening surface 1a of the temporary fastening member 1 and the holding surface 2a of the holding member 2 is set to be slightly smaller than the outer diameter of the cap 5 in a state where the cap is not present between them. The plurality of suction ports 3 arranged below the temporary tightening member 1 communicate with a suction device (not shown) such as a vacuum pump.

Next, referring to FIGS. 2, 4 and 5,
The guide means 4 including the swing guide used in the preferred embodiment of the present invention will be described in detail. FIG. 4 is a schematic side view of a temporary cap fastening device according to a preferred embodiment of the present invention, and FIG. 5 is a schematic perspective view of a guide means 4 including a swing guide. As shown in FIGS. 2, 4 and 5,
The guide unit 4 includes a base member 40 fixed to the apparatus main body, and a lower member 4 composed of a pair of elongated plate-like members extending from the base unit 40 to the downstream side of container transportation along the transportation line L of the container B.
1, 41, and an upper member 42, which is a plate-like member extending above the lower members 41, 41 in parallel with the lower members 41, 41 from the base 40 in the downstream direction of container transport.
The base 40 has a shape through which the cap 5 covered with the mouth portion of the container can pass, and is fixed to the main body of the apparatus. The pair of lower members 41, 41 abut on both side portions of the lower end of the cap 5 from below and extend in parallel with each other at an interval such that the cap 5 can be supported. Further, the upper member 42 is separated from the pair of lower members 41, 41 by a distance slightly larger than the height of the cap 5, and in the present embodiment by a distance larger than the height of the cap 5 by about 0.5 mm. 41, extending above 41. Therefore, as shown in FIG. 2, in the guide means 4, the cap 5 is supported at its lower end side portions from below by the upper side surfaces of the pair of lower members 41, 41, and the top surface of the upper member 42. It will be located at a slight distance from the lower surface, in this embodiment about 0.5 mm. The upper member 42 is arranged so as to cover above the top surface of the cap 5 that covers the mouth portion of the container B conveyed along the conveyance line L, and the lower side surface thereof is as shown in FIG. Further, a plurality of convex portions 42P are provided to reduce the contact friction between the upper member 42 and the top surface of the cap 5. Instead of providing the convex portion 42P, a Teflon or ceramic sheet may be attached, or processing such as fluororesin processing to reduce friction may be performed.

A pair of lower members 41, 41 and an upper member 42
Is a horizontal axis extending in a direction orthogonal to the container transport direction formed by a pivot pin 43 attached to the base 40, which is integrally connected at an upstream side portion of the guide means 4 in the container transport direction, that is, a base portion 40 side portion. It is configured so that it can swing up and down in the direction of arrow c at the center. In the present embodiment, the rocking guide is formed by the pair of lower members 41, 41 and the upper member 42. In this embodiment,
The upstream side portions of the upper member 42 and the lower member 41, which constitute the swing guide, in the container conveying direction are arranged so as to be positioned upstream of the temporary fastening member 1 in the container conveying direction. Therefore, the cap 5 covered on the mouth portion of the container B conveyed along the conveyance line L enters between the pair of lower members 41, 41 and the upper member 42 of the swing guide, and the guide means 4 is formed. Both sides of the lower end are supported by the lower member 41 and come into contact with the temporary fastening surface 1 a of the temporary fastening member 1.

As shown in FIG. 4, the lower members 41, 4
A screw hole 44 penetrating the lower member 41 in the up-down direction is formed in one side of the first member 1, and a bolt 45 is screwed into the screw hole 44. Since the length of the screw portion of the bolt 45 is set longer than the thickness of the lower member 41, the screw hole 44
Formed by the pivot pin 43 by projecting the tip end of the bolt 45 screwed into the lower part from the lower side surface of the lower member 41 to abut on the rail 6 located below the lower member 41. It is possible to define the lower position of the swing guide that is capable of swinging in the vertical direction about the horizontal axis.

Above the upper member 42, the base 40
An extension portion 401 that extends in parallel with the upper member 42 is provided from the upper portion toward the downstream side in the container transport direction.
A columnar member 402 extending downward toward the upper member 42 is attached to the extension 401. The tip of the columnar member 402 is arranged apart from the upper side surface of the upper member 42 by a predetermined distance. Therefore, when the swing guide including the upper member 42 swings upward by a predetermined amount, the tip end of the columnar member 402 contacts the upper side surface of the upper member 42,
This will prevent the swing guide from swinging further upward. A step portion 403 is formed at a substantially central portion in the longitudinal direction of the columnar member 402, and a compression spring 404 is interposed between the step portion 403 and the upper member 42. It functions as a biasing unit that biases the upper member 42 downward.

Further, the guide means 4 has a roller 405 for pressing the top of the cap 4 which covers the mouth portion of the container B conveyed along the conveyance line L. As shown in FIG. 4, the roller 405 is an L-shaped pivoting member that is pivotally mounted about a shaft 407 that extends horizontally through the upper portion of the base 40 in a direction orthogonal to the container transport direction. It is attached to the tip of 409 so as to be rotatable in the container carrying direction. More specifically, the roller 405 is configured to move the upper member 4 through the slot 421 formed in the upper member 42.
2 is arranged so as to protrude downward from the lower side surface of the second side surface. Further, as shown in FIG.
And an L-shaped pivot member 409, a compression spring 410 is interposed between the compression spring 410 and the L-shaped pivot member 409. The compression spring 410 urges the pivot member 409 downward about the shaft 407, and the pivot member 409 is rotated. A roller 405 attached to the tip of the cap 4 is configured to press and urge the top of the cap 4 that covers the mouth of the container B conveyed along the conveyance line L.

4 and 6 are provided on the downstream side of the upper member 42.
As shown in FIG. 5, a holding guide 500 having the same height as the upper member 42 at the highest position above the cap 4 along the conveyance path of the cap 4 of the container B to be conveyed, and regulation guides 502 on the left and right sides of the cap 4. Is provided. Presser guide 50
0 is supported by leg portions 504 extending left and right. The holding guide 500 and the regulation guide 502 are preferably made of stainless steel or the like and preferably have a round bar shape with a small contact friction with the cap 4, but may have a plate shape, or may have one or a plurality of pieces.

The cap temporary tightening device of the present embodiment configured as described above operates as follows. In this embodiment, as shown in FIG. 4, a container B, which is a PET bottle filled with mineral water or the like, has a sterilized cap 5 supplied through a chute S on the upstream side of the temporary fastening device. The part is covered and conveyed along the conveyance line L to the temporary cap fastening device. The cap 5 that covers the mouth portion of the container B is introduced into the guide means 4 as the container B is conveyed, and the cap 5 includes an upper member 42 and a pair of lower members 41, 41 that constitute a swing guide. Go in between. As described above, the swing guide including the upper member 42 and the pair of lower members 41, 41 is capable of swinging in the vertical direction about the horizontal axis formed by the pivot pin 42, and the compression spring 404. Since it is urged downward by, the downstream portion of the swing guide is usually inclined downward as shown by the solid line in FIG. That is, the rails 6 are arranged so as to gradually approach the rail 6 in the downstream direction of the container transport direction. In addition, the state of this inclination is
It is set by the amount of protrusion of the tip of the screw 45.

When the cap 5 which covers the mouth portion of the container B is introduced into the swing guide thus arranged, the cap 5 has lower end portions 4 at both lower ends thereof.
While being supported from below by the upper side surfaces of 1, 41, they travel between the lower members 41, 41 and the upper member 42. Then, the top surface of the cap 5 is pressed downward by the roller 405 protruding downward from the lower side surface of the upper member 42 through the slot 421 formed in the upper member 42. By this pressing, the cap 4 is pushed into the mouth portion of the container B, and the starting end of the thread of the cap 5 and the starting end of the thread of the mouth portion of the container B are easily engaged.
Further, when the cap 5 is tilted with respect to the mouth portion of the container, the tilt by the roller 405 is corrected.

When the cap 5 further advances in the direction of arrow a,
As shown in FIGS. 1 and 2, the cap 5 is sandwiched between the temporary fastening surface 1 a of the temporary fastening member 1 and the holding surface 2 a of the holding member 2. Since the temporary tightening member 1 is biased toward the holding member 2 by the spring means 7, the cap 5
Will move in the direction of arrow a while being sandwiched by a predetermined pressing force. On the temporary fastening surface 1a of the temporary fastening member 1,
Since teeth that can mesh with the teeth formed on the outer peripheral surface of the cap 5 are formed, the cap 5 is sandwiched between the temporary tightening surface 1a of the temporary tightening member 1 and the holding surface 2a of the holding member 2. And the teeth formed on the outer peripheral surface of the cap 5 mesh with the teeth formed on the temporary tightening surface 1a of the temporary tightening member 1, and the cap 5 moves in the direction of the arrow a as the container B is transported. As a result, the cap 5 rotates clockwise with respect to the container B, and as shown in FIG. 3, it is lightly screwed into the mouth portion of the container B and temporarily tightened.

During this temporary tightening, the cap 5 is screwed into the mouth of the container B while rotating, so that the container B
The height position decreases as the sheet moves toward the downstream side in the transport direction. Upper member 42 and lower members 41, 41
As described above, the rocking guide provided with is tilted downward on the downstream side in the container conveying direction, and thus is rotated and screwed into the mouth portion of the container B as the container B is conveyed. Both sides of the lower end of the cap 5 are always the lower member 4
The cap 5 is brought into contact with the upper side surfaces of the containers 1 and 41, and is guided by the lower members 41 and 41 forming the swing guide, and is screwed into the mouth portion of the container B while maintaining a substantially horizontal state. Become. Further, as described above, in this type of device, when the cap put on the mouth portion of the container B comes into contact with the upstream end of the temporary fastening member in the container transport direction,
The relative positional relationship between the threads formed on the inner circumference of the cap and the threads formed on the mouth portion of the container B is not constant. Therefore, as soon as the rotation of the cap begins,
The screw thread of the cap and the screw thread of the mouth portion of the container B are not necessarily engaged to start screwing of the cap, and the cap portion is not covered with the mouth portion of the container B. In some cases, for example, after idling 180 °, the starting end of the screw thread of the cap and the starting end of the screw thread of the mouth portion of the container are engaged, and screwing of the cap may be started. In such a case, in the cap temporary tightening device of the present embodiment, since the swing guide can swing in the vertical direction, the cap 5 is placed in the container B.
If the height position of the cap 5 does not change due to idling even though the cap 5 moves in the direction of the arrow a due to the conveyance, the top surface of the cap 5 comes into contact with the lower surface of the upper member 42 and compresses. The swing arm is once swung upward, for example, to the position shown by the chain line in FIG. 4 while resisting the biasing force of the spring 404, so that the cap 5 can smoothly advance without being blocked in the swing guide. it can. Then, when the cap 5 is rotated by the contact with the temporary tightening member 1 and the winding tightening of the cap 5 is started, the cap 5 moves downward toward the mouth part of the container B by the upper member 42. Pressed. For the container in which the cap 5 has been temporarily tightened, the cap 5 is finally tightened by a final tightening device (not shown).

If the cap 5 is not sufficiently tightened temporarily, the cap 5 that has advanced from the swing guide may float up from the mouth of the container B and fall, but this fall is supported by the leg member 504. Vertical presser guide 5
00 and the left / right regulation guide 502.

In this embodiment, during the operation of the temporary cap tightening device, the suction device communicating with the suction port 3 is operated to constantly suck the air in the vicinity of the temporary cap tightening device. According to the present embodiment as described above, the upper member 42 and the lower member of the lower member, which constitute the swing guide, are located upstream in the container transport direction.
Since it is arranged so as to be located on the upstream side of the temporary fastening member 1 in the container transport direction, the cap 5 put on the mouth portion of the container B is provided between the lower members 41, 41 and / or the upper member 42. Since it comes into contact with the temporary tightening surface 1a of the temporary tightening member 1 in the state in which it is arranged, contact with the temporary tightening member 1 does not cause a large inclination with respect to the mouth portion of the container B, and the temporary tightening is smooth. And it can be done reliably. Further, the swing guide constituted by the upper member 42, the lower member 41, etc. is formed by the pivot pin 43 provided at the upstream side portion in the container transport direction and extending horizontally in the direction orthogonal to the container transport direction. Since the cap 5 can be swung in the vertical direction about the horizontal axis, the caps 5 at different height positions for each container can be maintained in a substantially horizontal state, and temporary tightening can be performed smoothly and reliably.

In the above description, the cap temporary tightening device of this embodiment has been described by taking the case of temporarily tightening the cap 5 having a substantially flat top surface as an example. It can also be used when temporarily tightening a cap having a convex shape upward, for example, a hemispherical shape, to the mouth portion of the container B.

In such a cap having an upwardly convex top surface, the top surface of the cap is the upper member 42.
When temporarily tightening while contacting the lower side surface of the cap, the cap rotates by contacting the lower side surface of the upper member 42 with only the uppermost part of the convex top surface of the cap close to the point contact. Will be temporarily tightened. Therefore, friction between the cap and the lower surface of the upper member 42 is small, and the cap is smoothly rotated, that is, temporarily tightened.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a temporary cap fastening device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG.

FIG. 3 is an explanatory diagram showing a relationship between a temporary fastening member of a cap and the cap.

FIG. 4 is a schematic side view of a cap temporary tightening device according to a preferred embodiment of the present invention.

FIG. 5 is a schematic perspective view of guide means provided with a swing guide used in the temporary cap fastening device.

FIG. 6 is a schematic perspective view of a holding guide and a regulation guide used in the temporary cap fastening device.

[Explanation of symbols]

1 Temporary tightening part 1a Temporary tightening surface 2 holding member 2a Holding surface 4 Guide means 5 caps 6 rails 40 base 41 Lower member 42 Upper member 43 Axis pin 44 screw holes 45 bolt 45 401 extension 402 Column member

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akinori Ono 1-5-7 Mikitei-cho, Higashi-Osaka City, Osaka Prefecture House Foods Co., Ltd. (72) Shingo Hirano 1-5-5 Mikitei-cho, Higashi-Osaka City, Osaka Prefecture No. 7 House Food Co., Ltd. (56) References: Kaikaihei 7-21597 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B67B 3/20

Claims (6)

(57) [Claims] 1. A cap temporary tightening device for temporarily tightening a screw-in cap mounted on the mouth of a container conveyed on a line to the mouth, the cap temporary tightening device extending along the line, A temporary fastening member that contacts the outer peripheral surface of the cap that covers the mouth portion, a lower member that extends along the line and supports both lower end portions in the container transport direction of the cap that covers the mouth portion of the container, An upper member that extends substantially parallel to the lower member at a distance slightly larger than the height of the cap from the lower member, has an upper member that can contact the upper end of the cap, and extends in a direction orthogonal to the container transport direction. A swing guide that is capable of swinging in the vertical direction about a horizontal axis, and a cap position correcting means that shifts the cap being conveyed outside a predetermined area into a predetermined area, wherein the horizontal axis is the swing guide Cap temporary tightening device, characterized in that provided upstream of the vessel conveying direction. 2. The cap, wherein the cap position correcting means is a roller that is rotatably mounted in the container transport direction and is spring-biased toward the top of the cap that covers the mouth of the container. Temporary fastening device. 3. The cap temporary tightening device according to claim 1, wherein a convex portion directed downward is provided on the back surface of the upper member of the swing guide. 4. The cap temporary tightening device according to claim 1, wherein a sliding sheet having a friction coefficient smaller than that of metal is arranged on the back surface of the upper member of the swing guide. 5. The temporary cap fastening device according to claim 1, wherein a holding guide member for holding the cap in a predetermined region in the upward direction is continuously provided on the downstream side of the swing guide. 6. The temporary cap fastening device according to claim 1, wherein a regulating guide member for holding the cap in a predetermined region in the left-right direction is continuously provided on the downstream side of the swing guide.