JP2017100737A - Chuck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chuck for transportation of a cap which can reliably hold a cap of a universal design shape provided with a flipper or the like with a simple structure, and which does not damage the cap at the time of attachment and detachment thereof.SOLUTION: A chuck 100 having a chuck body 110 with a holding hole 111, and a cap support mechanism 120 for supporting a cap 200 in the holding hole 111. The cap support mechanism 120 has: a circumferential pressing groove 121; a penetration part 123 which reaches the holding hole 111 from the pressing groove 121; a split claw 126 which is inserted in the penetration part 123; and an elastic pressing body 122 which is fitted in the pressing groove 121 and energizes the split claw 126. The chuck 100 has a knurl 112 which can be fitted in a convexed flipper 220, which is formed on the cap 200, on a side of an inner peripheral surface of the holding hole 111 above the cap support mechanism 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cap chuck for mounting on a mouth of a spout of a PET bottle or a pouch.

Conventionally, it is known that a chuck is used for transporting or mounting a cap to be mounted on a mouth portion of a PET bottle or a pouch spout.
For example, a chuck known from Patent Document 1 or the like includes a chuck body having a holding hole that is large enough to contain a cap, and a cap support mechanism that supports the cap within the holding hole.
The cap support mechanism includes a groove in the circumferential direction provided on the outer surface of the chuck body, a through portion formed so as to reach the holding hole in at least one position of the groove, and is inserted to hold the tip. A holding claw inserted into the through-hole so as to be retractable toward the inside of the hole, and a rubber ring fitted in a concave groove outside the pressing claw, and the inner circumference of the holding hole above the cap support mechanism The surface has a knurl in which irregularities are formed at equal intervals to the knurl formed on the top of the cap.
When the chuck is put on the cap, the pressure claw holds the cap with the pressure that presses against the knurled, and the knurled and knurl are mounted so as to fill each other's irregularities, so the relative position of the cap and chuck in the rotational direction is fixed. Cap can be lifted.
When the chuck holding the cap is moved to the mouth of a spout or the like of a PET bottle or a pouch, the female thread on the inner surface of the cap and the male thread on the outer surface of the mouth are aligned, and the chuck is rotated, the cap is screwed into the mouth. Thereafter, when the chuck is raised, the cap attached to the bottle is detached from the chuck.

JP-A-11-49286

Since this known chuck holds the cap by the horizontal force that presses the claw with its tip narrowed against the knurled cap, the contact point between the side surface of the cap and the claw may be depressed, There is a possibility that the cap may be damaged by removing the cap at the time of detachment of the cap, and the shavings of the cap may be mixed into the bottle as foreign matter.
In addition, since the cap is prevented from dropping only by the horizontal force that presses the claw with its narrowed tip against the knurled cap, the relative position of the cap and chuck may shift due to continuous vibration or sudden vertical movement. There was a risk that the cap would fall off the chuck.
In addition, since the cap is held by holding the cap knurled at the tip of the pressing claw, a universal design has been applied, such as providing a large convex flipper on the side of the cap so that it can be easily opened. When transporting the cap, the outermost distance between the flipper and the knurl becomes large, and even if the pressing claw has a short stroke for pressing the knurl or takes a method of pressing the flipper, precise positioning is required. If the positions of the pressing claw and the flipper are misaligned, there is a possibility that satisfactory holding cannot be performed and the cap may fall off the chuck.

  The present invention solves the above-mentioned problems, and can hold a universal design-shaped cap provided with a flipper or the like with a simple configuration without the need for precise alignment, and can damage the cap during removal. Aim to provide no chuck.

  The chuck according to the present invention is a chuck having a chuck body having a holding hole having a size capable of containing a cap, and a cap support mechanism for supporting the cap inserted into the holding hole. Is a circumferential pressing groove provided on the lower outer surface of the chuck body, a plurality of through portions reaching from the pressing groove to the holding hole, and a plurality of split claws inserted into the plurality of through portions. A pressing elastic body that fits into the pressing groove and biases the split claw toward the center axis of the holding hole, and restricts movement of the split claw toward the holding hole in the through portion. The split claw has a claw recess that opens to the holding hole side and engages with the locking rib, and is provided above the cap support mechanism on the inner peripheral surface of the holding hole. Fits into the convex flipper formed on the cap By having a possible knurled, it is intended to solve the above problems.

According to the chuck of the first aspect of the present invention, since the tip of the split claw, which is a contact point with the cap, is formed by a long surface in the circumferential direction, There is no local contact and pressing, and deformation and scratches on the cap can be suppressed.
Each split claw is movable in the outer peripheral direction of the holding hole, and each split claw is inserted with a predetermined play between the penetrating portion and the locking rib, whereby the cap flipper is inserted. Accordingly, the moving direction when the split claw is in contact can be passively adjusted, and the pressing load from one end of the split claw applied to the outer surface of the cap when the cap is detached can be dispersed.
By this, the other end of the claw that is not in contact with the flipper is in contact with the outer surface of the cap, so that the pressing load can be further dispersed, and the claw that is urged by the pressing elastic body can be easily received by the cap. Can be locked in place.
In addition, since a bridge portion is formed between the adjacent through portions, it is possible to fill a gap between adjacent split claws and prevent a cap from being detached due to a flipper entering the gap.
Furthermore, since a plurality of penetrating parts and split claws are provided, a uniform pressing load is applied to the cap in the circumferential direction, and the holding position of the cap is less likely to deviate from the center of the holding hole. Is sufficiently large, the split claw can prevent the cap from falling off by pressing the side surface below the maximum diameter portion of the flipper.
By having a knurl that can be fitted into a convex flipper formed on the cap, the cap can be guided so that the flipper is guided toward the adjacent knurl recess even if the knurl convex portion and the flipper come into contact with each other. Since it rotates slightly, there is no need for precise alignment.

  According to the second aspect of the present invention, the cap held by the chuck is inserted into the holding hole until the outermost diameter portions of the plurality of flippers are respectively positioned above the at least one split claw. The lower side of the outermost diameter portion of the flipper is reliably supported by the split claw, and the cap does not fall off from the chuck.

  According to the configuration of the third aspect of the present invention, since the inner diameter of the cap support mechanism on the inner peripheral surface of the holding hole becomes narrower upward, the cap can be prevented from excessively entering the chuck.

  According to the fourth aspect of the present invention, since the concave portions of the knurling are uniformly arranged in the holding hole by an integral multiple of the number of the convex flippers formed on the cap, the positions of the flipper and the knurling when the cap is received. Even if the knurls are not accurately aligned, the protrusion of the knurl and the flipper interfere with each other, so that the cap can be properly held without causing the cap to rotate greatly and the knurl can be held appropriately.

  According to the configuration of the fifth aspect of the present invention, since the biasing member biases the top surface of the cap from the upper side to the lower side of the holding hole, the backlash of the cap is suppressed, and the cap enters the holding hole excessively. In addition to preventing this, it is possible to reduce the tensile load applied to the engaging portion between the cap and the mouth portion fitted to the cap when the cap is removed from the chuck.

According to the configuration of the sixth aspect, since the plurality of through portions are larger than the number of convex flippers formed in the cap, one split claw does not press the plurality of flippers.
Thus, a sufficient and uniform pressing load can be applied to each flipper, and the holding position can be prevented from deviating from the center of the holding hole without applying an uneven pressing force to the cap.

  According to the configuration of the present invention, since the split claw has an arcuate surface that is longer in the circumferential direction than at least the flipper width, it can be reliably supported by the split claw below the outermost diameter portion of the flipper, The cap can be prevented from falling off the chuck.

The perspective view of the chuck | zipper 100, front sectional drawing, and A-A 'sectional drawing. The perspective view, front sectional view, bottom view, and B-B ′ sectional view of the state where the O-ring 122 and the split claw 126 are assembled to the chuck 100. The perspective view of the cap 200, a top view, and C-C 'sectional drawing. The front sectional view and D-D 'sectional view in the state where cap 200 is held by chuck 100.

Below, chuck 100 concerning one embodiment of the present invention is explained based on a drawing.
As shown in FIGS. 1 to 4, the chuck 100 holds the cap 200, and transports and attaches it to the mouth of a spout of a PET bottle or a pouch. The holding hole has a size that can contain the cap 200. The chuck body 110 has a cap body 110 and a cap support mechanism 120 that supports the cap 200 inserted into the holding hole 111.
Above the cap support mechanism 120 on the inner peripheral surface of the holding hole 111 of the chuck body 110, there is a knurl 112, and the knurl 112 is composed of 16 sets of elongated knurl recesses 113 and knurl protrusions 114. .
Further, the inner peripheral surface of the holding hole 111 provided with the knurl 112 is formed so that the inner diameter gradually becomes narrower from the cap receiving side.

The cap support mechanism 120 includes a circumferential pressing groove 121 provided on the lower outer surface of the chuck body 110 and a through portion 123 extending from the pressing groove 121 to the holding hole 111.
An O-ring 122 is fitted into the pressing groove 121, and the through portion 123 is equally divided into four by a bridge portion 124. Each of the through portions 123 is provided with a locking rib 125 and a split claw 126. The split claw 126 is formed in a circular arc plate shape, and the inner diameter side of the split claw 126 is configured by a curved surface from the upper surface to the lower surface, and is opened radially inward from the circumferential center on the inner diameter side of the split claw 126. A claw recess 127 is provided, and the split claw 126 is engaged with the locking rib 125 when the locking rib 125 enters the claw recess 127.
That is, the locking rib 125 is located at the center in the circumferential direction of the split claw 126.
Between the claw 126 and the bridge portion 124, and between the claw recess 127 and the locking rib 125, there is a predetermined play that allows an inclination in the moving direction of the claw 126.
As shown in FIG. 3, the cap 200 is provided with a knurl 210 on the outer peripheral surface of the cap 200, and the knurl 210 is configured by four elongated knurl concave portions 211 and four knurl convex portions 212 arranged at equal intervals on the outer peripheral surface. ing. The most protruding portion of the knurl projection 212 is referred to as a flipper 220. As shown in FIG. 3, the vertical cross-sectional shape of the flipper 220 projects from the center of the top surface of the cap 200 downward in the outer diameter direction of the cap 200, and from the outermost part of the flipper 220 downward. It is comprised by the arc-shaped surface which decreases in diameter direction.
Further, the width between adjacent split claws and the circumferential width of the claw recess, the bridge portion, and the locking rib are formed to be smaller than the circumferential width of the flipper 220, and the bridge portion 124 and the locking rib are formed. The outermost diameter of a circle connecting the surfaces along the knurled recess 113 on 125 is formed to be slightly larger than the outermost diameter of the flipper 220.

Next, a method for conveying the cap 200 using the chuck 100 according to this embodiment will be described.
First, as shown in FIG. 4, after moving the chuck 100 above the top surface of the cap 200, the chuck 100 is lowered and the cap 200 is inserted into the holding hole 111.

When the chuck 100 reaches above the cap 200, if the flipper 220 is positioned on the same straight line as the knurled recess 113, when the chuck 100 is lowered toward the cap 200, the cap 200 enters the holding hole 111, The flipper 220 of the cap 200 pushes the split claw 126 away, and the cap 200 enters the holding hole 111 of the chuck 100 while maintaining the positional relationship in the rotation direction between the chuck 100 and the cap 200.
At this time, the inner diameter side of the split claw 126 is formed from a curved surface from the upper surface to the lower surface, and there is no sharp point. The cap 200 can be inserted into the holding hole 111 of the cap 100 without being attached. The four flippers 220 that have passed over the split claw 126 enter the knurled recess 113 immediately above each.
In addition, when the flipper 220 is positioned on the same straight line as the knurled protrusion 114, the cap 200 is slightly guided to the adjacent knurled recess 113 when the knurled protrusion 114 and the flipper 220 come into contact with each other. Therefore, it is not necessary to position the chuck 100 and the cap 200 in the rotational direction.

By the time the flipper 220 of the cap 200 reaches the back of the chuck 100 along the knurled recess 113, the outermost diameter portion of the flipper 220 has passed over the split claw 126. At this time, since the split claw 126 urged by the O-ring 122 contacts the cap 200 below the outermost diameter portion of the flipper 220 to support the cap 200, the chuck 100 rises and the cap 200 comes off the grounding surface. Even if it floats, it does not fall off, and as shown in FIG. 4A, the chuck 100 can be moved while the cap 200 is held.
Further, even when the cap 200 is inserted into the holding hole 111 of the chuck 100 in a state where the flipper 220 is along the knurled recess 113 facing the bridge portion 124 or the locking rib 125, the width between adjacent split claws, The circumferential width of the claw recess, the bridge portion, and the locking rib is formed to be smaller than the circumferential width of the flipper 220, and the surface along the knurled recess 113 on the bridge portion 124 and the locking rib 125 is formed. Since the outermost diameter of the connected circles is formed to be slightly larger than the outermost diameter of the flipper 220, as shown in FIGS. 4B and 4C, the outermost diameter portion of the flipper 220 is formed. Since the split claw 126 reliably contacts the lower sides of both sides and supports the cap 200, the chuck 100 can be moved while the cap 200 is held.

After moving the chuck 100 holding the cap 200 above the mouth of the container, the chuck 100 is lowered so as to align the cap 200 with the mouth of the container. When the internal threaded portion inside the cap 200 descends to a position where it interferes with the external threaded portion of the container mouth, the chuck 100 rotates in the direction of tightening the screw, and the cap 200 is screwed into the container mouth. At this time, since the flipper 220 is fitted in the knurled recess 113, the cap 200 rotates reliably in conjunction with the chuck 100 without rotating idle.
When the chuck 100 is lifted after the cap 200 is sufficiently screwed into the opening of the container, the cap 200 receives a tensile force from the container in the direction of coming out of the holding hole 111 of the chuck 100, so that the flipper 220 disengages the split claw 126. The cap 200 is disengaged from the holding hole 111 of the chuck 100 by being pushed away, and the screwing operation of the cap 200 is completed.
At this time, the inner diameter side of the split claw 126 is formed by a curved surface from the upper surface to the lower surface, and there is no sharp point. Therefore, even if the flipper 220 pushes over the split claw and gets over, the surface of the cap 200 is damaged by the claw. The cap 200 can be removed from the holding hole 111 of the chuck 100 without being attached.

As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment, A various design change can be made without deviating from this invention described in the claim. Is possible.
For example, the chuck according to the above-described embodiment has been described as having four split claws. However, the number of split claws is not limited to four, and may be more than the number of flippers provided on the cap. For example, in the case of the above-described embodiment, five or more split claws may be provided.
Further, the chuck of the above-described embodiment has been described on the assumption that 16 sets of knurls are uniformly arranged on the circumference. However, the number of knurls is not limited to 16, and an integer of the number of flippers provided on the cap. As long as it is evenly arranged on the circumference at a double, for example, 24 sets may be provided on the circumference.
Moreover, although the chuck of the above-described embodiment has been described on the assumption that the split claw is urged by the O-ring, the urging method is not limited to the O-ring, and a force that urges the claw on the inner peripheral side is provided. It may be generated as long as it is generated, and may be biased by, for example, a spring or an air cylinder.

Further, in the chuck of the above-described embodiment, the split claw is formed in a circular arc plate shape, and the inner diameter side of the split claw is described as a curved surface from the upper surface to the lower surface, but the shape of the inner diameter side of the split claw is However, the present invention is not limited to this, and may have a shape along the flipper of the cap. For example, unevenness similar to that of the knurling may be provided.
The chuck of the above-described embodiment has been described as limiting the amount of movement of the claw by engaging the claw recess of the claw with the locking rib. The claw may be provided so that it can be supported from below the flipper by pressing the cap uniformly in the circumferential direction.For example, the claw recess and the locking rib are eliminated, and the claw that moves in the urging direction is provided. A bridge portion that can be locked by abutting against the side surface of the split claw so as not to exceed a predetermined position may be provided.

Moreover, although the chuck of the above-described embodiment has been described as being formed so that the inner diameter of the inner peripheral surface provided with the knurling in the holding hole is gradually narrowed from the cap receiving side, The shape is not limited to this, and it is sufficient that the cap flipper is fitted in the knurled recess and can be held at a predetermined position. For example, the inner diameter of the inner peripheral surface of the holding hole is made uniform and the knurled May be formed on the entire circumference, and the cap may be pressed by the biasing member from above the holding hole so that the cap can be held at a predetermined position.
Moreover, although the chuck | zipper of embodiment mentioned above demonstrated as the knurl, the bridge | bridging part, and the latching rib in a holding hole having the same phase position on the circumference, the knurl | Is not limited to this, for example, the knurl, the bridge portion and the locking rib may be in different circumferential positions on the circumference, and one chuck has the same circumferential position on the circumference, Those at different phase positions on the circumference may be mixed.

DESCRIPTION OF SYMBOLS 100 ... Chuck 110 ... Chuck main body 111 ... Holding hole 112 ... Knurling 113 ... Knurling recessed part 114 ... Knurling convex part 120 ... Cap support mechanism 121 ... Pressing groove 122 ...・ ・ O-ring 123 ・ ・ ・ Penetrating part 124 ・ ・ ・ Bridge part 125 ・ ・ ・ Locking rib 126 ・ ・ ・ Split claw 127 ・ ・ ・ Claw recess 200 ・ ・ ・ Cap 210 ・ ・ ・ Knurl 211 ・ ・ ・ Nar Recessed portion 212 ・ ・ ・ Knurled portion 220 ・ ・ ・ Flipper

Claims (7)

A chuck having a chuck body having a holding hole of a size capable of containing a cap, and a cap support mechanism for supporting the cap inserted into the holding hole,
The cap support mechanism includes a circumferential pressing groove provided on a lower outer surface of the chuck body, a plurality of through portions reaching from the pressing groove to the holding hole, and a plurality of inserted into the plurality of through portions. And a pressing elastic body that fits into the pressing groove and biases the split claw toward the center axis of the holding hole,
The penetrating portion is provided with a locking rib that restricts the movement of the split claw toward the holding hole,
A bridge portion is formed between the adjacent through portions,
The split claw has a claw recess that is opened to the holding hole side and engages with the locking rib;
A chuck having a knurl that can be fitted into a convex flipper formed on a cap above the cap support mechanism on the inner peripheral surface of the holding hole.   The said holding | maintenance hole is comprised so that insertion of the said cap is possible until the outermost diameter part of the said some flipper is located above at least 1 said split claw, respectively. Chuck.   3. The chuck according to claim 1, wherein an inner diameter of the holding hole is formed so that an inner diameter of the cap supporting mechanism is narrowed upward.   4. The chuck according to claim 1, wherein the concave portions of the knurling are arranged uniformly by an integral multiple of the number of the convex flippers formed on the cap. 5.   The chuck according to any one of claims 1 to 4, wherein the holding hole is provided with a biasing member that biases the top surface of the cap to be held.   6. The chuck according to claim 1, wherein the plurality of through portions are provided more than the number of convex flippers formed in the cap.   The chuck according to any one of claims 1 to 6, wherein the split claw has an arcuate surface that is longer in a circumferential direction than at least the flipper width.

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