JP2018157774A - Roasting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roasting device that roasts beans so that aroma of beans is provided and stirs the beans without oscillating the roasting device while being placed over fire.MEANS FOR SOLVING THE PROBLEM: A roasting device includes: an opening part 21 into which beans can be loaded; and a body part 25 connected to the opening part 21, having a predetermined capacity for accumulating the beans and constituted of ceramic that emits far-infrared ray when being heated. A plurality of projection parts 300 having a predetermined shape are provided on an inside of the body part 25.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for roasting beans, in particular coffee beans.

  As a device for roasting coffee beans, there is a large-sized device for business use, but the capacity to put coffee beans is too large, and it is not for roasting a relatively small amount of beans. Therefore, Japanese Patent Laid-Open No. 2003-061578 is disclosed as a roasting device used for a relatively small amount of beans. In the one-handed pan, the bottom portion (11) of the pan body (1) is formed in a similar shape of the lower half that is divided into two vertically from the long axis of the medicinal capsule, and continuous from the entire upper edge of the bottom portion (11). Then, a peripheral wall portion (12) is provided in the upper direction at a height exceeding the radius of the bottom portion (11), and the upper edge of the facing long wall (13) which is a part of the peripheral wall portion (12) is provided. An arc-shaped arc wall (14) is continuously formed integrally, and at least one of the integrated arc wall (14) and the long wall (13) is curved with a curved surface similar to the curved surface of the bottom (11). A roasting wall (15) is formed so as to be wound toward the long axis so as to form a cylindrical shape, and a handle (3) is provided substantially parallel to the long axis of the pan body (1). It is a roaster.

  This roaster has a one-handed pan shape and is made of metal such as titanium, so it may be burnt when roasting beans and hindering roasting with a bean scent. There is. In addition, because of the shape of a one-handed pan, the beans must be shaken on the fire in the manner of making a so-called pan after the roaster is set on fire. There is a risk of beans burning.

JP 2003-061578 A

  The present invention has been made in view of the above points, and the problem is to roast the roaster so that the scent of the beans is as much as possible, and to swing the roaster while the roaster is on fire. It is to provide a roaster capable of stirring beans without any problems.

  In order to solve the above-mentioned problems, a roasting apparatus according to a first aspect has an opening that can be filled with beans, and is connected to the opening and has a predetermined volume for storing the beans, and is heated. Then, a main body portion made of ceramic that generates far infrared rays is provided, and a plurality of protrusions having a predetermined shape are provided inside the main body portion.

  In the roasting apparatus according to the second aspect, in the first aspect, the shape of the plurality of protrusions is a cone-shaped protrusion that exhibits a conical shape, a quadrangular pyramid-shaped protrusion that exhibits a quadrangular pyramid, or a trapezoidal shape in cross-sectional view. It has one of the trapezoidal protrusions to be presented.

  Moreover, the roaster of the 3rd viewpoint arrange | positions the crossing board part which has a through-hole for arrange | positioning the stirring apparatus which stirs a bean in an opening part in a 1st viewpoint or a 2nd viewpoint, The stirring device for stirring the beans so as to be rotatable is disposed in the through hole.

  The roaster according to the fourth aspect is the roasting device according to the third aspect, wherein the stirring device includes a shaft portion disposed in the through hole, a wing portion disposed at the shaft portion so that the bottom plate portion can be opened and closed. , Has.

  Since the present invention is configured and operates as described above, it is roasted so that the aroma of the beans stands, and the roaster is shaken in a state where the roaster is set on fire. It is possible to provide a roaster capable of stirring beans without any problems.

A is a top view of a roaster. B is a side view of the roaster. A is a right side view of the roaster. B is a left side view of the roaster. It is the III-III sectional view enlarged view of FIG. A is an enlarged perspective view of a conical protrusion. B is a cross-sectional view of a conical protrusion. A is an enlarged perspective view of a quadrangular pyramidal protrusion. B is a cross-sectional view of a quadrangular pyramidal protrusion. A is an enlarged perspective view of a trapezoidal protrusion. B is a sectional view taken along line VIB of A. FIG. A is a top view which has arrange | positioned the stirring apparatus to the roaster. B is a side view thereof. A is a top view of a delivery board. B is a side view thereof. It is a side view of a stirring apparatus. It is a top view of a handle part. A is an enlarged front view of the wings. B is an enlarged side view thereof.

  Examples will be described below. The roaster 10 of the present embodiment is made of ceramic, has an opening 20 for charging beans, communicates with the opening 20, and has a main body 25 that can store the charged beans. Have. The roasting device 10 is made of ceramic because far infrared rays are generated when heat is applied thereto. In other words, far-infrared rays are best suited for roasting beans, and when the outside of the beans is warmed, it is known that the heat propagates inside and uniformly enters, and there is less scorch than when directly heating. This is because roasting is possible. The beans are preferably coffee beans.

  Further, the main body portion 25 has a bottom portion 30 and a side surface portion 40 that constitutes a side surface. The bottom portion 30 has a substantially circular shape in plan view, and literally constitutes the bottom of the roaster 10. The side surface portion 40 is composed of a side surface lower portion 41 and a side surface upper portion 42, and the side surface lower portion 41 is configured to rise obliquely upward from the side view bottom portion 30. The connecting portion 43 that connects to 42 is configured to have a maximum diameter. The opening 20 and the bottom 30 are preferably the same area. Further, the lower side surface 41 is configured to rise outward and obliquely upward. In addition, the angle A with respect to the bottom part 30 of this side surface lower part 41 has a preferable angle of 125 degree | times (refer FIG. 1B).

  The upper side surface 42 connected to the lower side surface 41 gradually decreases in diameter as it goes upward in the side view, and is connected to the opening 20. In order to dispose a later-described connecting plate portion 200 (see FIG. 8), concave attachment portions 21 and 22 to which the connecting plate portion 200 can be attached are disposed in the opening 20. Further, the upper side surface 42 is configured to rise inward and obliquely upward. In addition, the angle B with respect to the connection part 43 of this side surface upper part 42 has a preferable angle of 55 degree | times (refer FIG. 1B). The bottom portion 30 and the connection portion 43 are arranged in parallel.

  Moreover, in the opening part 20, the grip part 50 which a user can hold | grip from the upper side part 42 to the lower side part 41 is provided so that it may protrude outward.

  Further, the inner portion 31 of the bottom portion 30 has a protrusion 300 having a predetermined shape. Here, the predetermined projecting portion 300 means any one of a conical projecting portion 310 having a conical shape, a quadrangular pyramidal projecting portion 320 having a quadrangular thrust shape, and a trapezoidal projecting portion 330 having a trapezoidal shape in cross section.

  As described above, the protrusions 300 having a predetermined shape are disposed on the inner part 31 of the bottom part 30 in order to increase the surface area of the inner part 31, increase the amount of far infrared rays to be emitted, and increase the efficiency of roasting beans. It is.

  That is, in the present embodiment, the predetermined shape of the protrusion 300 includes a conical protrusion 310 having a conical shape, a quadrangular pyramidal protrusion 320 having a quadrilateral thrust shape, and a trapezoidal protrusion 330 having a trapezoidal shape in cross section. Either is preferred.

  The conical protrusion 310 has an isosceles right triangle shape in cross section with a conical side portion 313 having an apex 311 angle of 90 degrees and a horizontal angle 312 of 45 degrees in cross section. Preferred (see FIGS. 4A and 4B). As a result, when there are a plurality of conical protrusions 310, far infrared rays radiated from the conical side part 313 of one adjacent conical protrusion 310 are absorbed by the conical side parts 313 of the other conical protrusions 310. This is because it can be prevented. Therefore, the adjacent angle X is preferably 90 degrees. It is also preferable that the adjacent angle X is 90 degrees or more by setting the vertex 311 and the horizontal angle 312 to an angle different from that described above. Of course, this is not the case when the conical protrusion 310 is disposed inside the side surface 40 as will be described later. FIG. 4 shows a part of the plurality of conical protrusions 310 extracted.

  Further, when the conical protrusion 310 is provided, the surface area is increased by about 1.33 times as compared with the case where the conical protrusion 310 is not present on the inner portion 31 of the bottom 30 at all. For example, when one conical protrusion 310 having the largest conical bottom portion 314 (that is, the diameter in this case is 5 millimeters) to be disposed in the square section S of 5 square millimeters is disposed, The difference from the area of the conical bottom protrusion 314 in the conical protrusion 310 is determined from the area of the square section S of 5 square millimeters, and the difference is the sum of the surface area of the conical side 313 in the conical protrusion 310. Ask for.

  As a result, the surface area in the case where the section S has the conical protrusion 310 and the surface area in the case where it does not have, that is, the surface area of the section S increase by 1.33 times. Thus, the far infrared rays radiated by increasing the surface area are increased, and an increase in efficiency when roasting beans is expected.

  When the number of the conical protrusions 310 having such a shape increases with respect to the section S having a certain area, the interval between the apexes 311 is narrowed, and the height from the conical bottom surface portion 314 that is the bottom surface to the apex 311 is also increased. Lower. When one conical protrusion 310 is arranged in the case of a square section S of 25 square millimeters, its height is 2.5 millimeters, but when it increases to four, it becomes 1.25 millimeters gradually. The height is reduced. In addition, the distance between the apexes 311 of the plurality of conical protrusions 310 adjacent to each other is 1.25 millimeters, which is half of the height, and when the number increases to four, the height is 0.625 millimeters. However, even if the number of protrusions increases or decreases, the surface area (area that emits far-infrared rays) is 1.33 times that of the case without protrusions.

  As a result, if the interval between the conical protrusions 310 is too wide, beans may be clogged. Measurements have shown that the smallest part of the length, width and height of beans, especially coffee beans, is the width of the beans and the size is approximately 3 millimeters. Therefore, the interval between the conical protrusions 310 is preferably 2 millimeters or less.

  Further, the quadrangular pyramidal protrusion 320 preferably has a right isosceles triangular shape with the vertex 321 being 90 degrees in the sectional view and the horizontal angle 322 being 45 degrees (FIGS. 5A and 5B). reference). Thus, when there are a plurality of quadrangular pyramidal projections 320, far infrared rays radiated from the quadrangular pyramid side portion 323 in one adjacent quadrangular pyramidal projection 320 are square pyramidal in the other quadrangular pyramidal projections 320. This is because absorption by the side portion 323 can be prevented. Therefore, the adjacent angle Y is preferably 90 degrees. In addition, it is also preferable that the adjacent angle X is 90 degrees or more by making the vertex 321 and the horizontal angle 322 different from those described above. Of course, this is not the case when the quadrangular pyramidal protrusion 320 is disposed inside the side surface 40 as will be described later. FIG. 5 shows a part of the plurality of quadrangular pyramidal protrusions 320 extracted.

  In addition, the surface area is increased by about 1.42 times as compared with the case where the projections of the quadrangular pyramidal projections 320 are not present at all on the inner side 31 of the bottom 30. Thus, the far infrared rays radiated by increasing the surface area are increased, and an increase in efficiency when roasting beans is expected.

  When the number of the quadrangular pyramidal protrusions 320 having such a shape increases with respect to the section S2 having a certain area, the interval between the apexes 321 is narrowed, and the bottom surface of the quadrangular pyramid bottom 324 to the apex 321 is reduced. The height is also lowered. When one square pyramidal protrusion 320 is arranged in the case of a square section S2 of 25 square millimeters, the height is 2.5 millimeters, but gradually increases to 1.25 millimeters when the number increases to four. Reduce. In addition, the distance between the apexes 321 of the plurality of adjacent quadrangular pyramidal protrusions 320 is 1.25 millimeters, which is half the height, and the height increases to four, and the height is 0.625 millimeters. . However, even if the number of protrusions changes, the total area (area for emitting far-infrared rays) does not change to 1.42 times compared to the case without protrusions.

  As a result, if the intervals between the quadrangular pyramidal protrusions 320 are too wide, beans may be clogged. As described above, it has been found that the smallest of the lengths and heights of the beans, particularly coffee beans, is the width of the beans and the size is about 3 millimeters. Therefore, the interval between the quadrangular pyramidal projections 320 is preferably 2 millimeters or less.

  Both the conical protrusion 310 having the conical shape and the quadrangular pyramidal protrusion 320 having the quadrilateral shape in the protrusion 300 can support the beans to be roasted with dots. Therefore, in the ceramic roaster 10, the area when the conductive heat having a high heat density that causes scorching is in contact with the beans is reduced from the surface to the line or the point, thereby preventing scorching. At the same time, fragrant beans can be roasted by the effect of far infrared rays.

  In addition, the trapezoidal protrusion 330 having a trapezoidal shape in cross-section has trapezoidal protrusions 330, 330, 330 arranged in the vertical direction with respect to one section S3, for example, as illustrated in FIGS. 6A and 6B. Preferably, trapezoidal protrusions 330, 330, 330 are arranged in the lateral direction, and twelve trapezoidal protrusions 330 are alternately arranged for the section S3. 6B, the cross-sectional shape of the trapezoidal protrusion 330 has a length of 2 when the bottom 331 of the trapezoidal protrusion 330 is 3, and the side 340, The angle Z1 of 340 is preferably 45 degrees with respect to the base 331. The apex angle Z2 is preferably 90 degrees, and is an isosceles triangle having an apex angle of 90 degrees. Note that FIG. 6A shows a partial section S3 having a plurality of trapezoidal protrusions 330 extracted.

  In addition, the 5 mm four-way section S3 is divided into four, and two sets of trapezoidal protrusions 330, 330, 330 in the vertical direction and two sets of trapezoidal protrusions 330, 330, 330 in the horizontal direction are arranged. Thus, the surface area increases approximately 1.24 times compared to the case where the 12 trapezoidal protrusions 330 are arranged and the case where the 12 trapezoidal protrusions 330 are not present at all. Thus, the far infrared rays radiated by increasing the surface area are increased, and an increase in efficiency when roasting beans is expected.

  In addition, any one of the conical protrusion 310 having the above-described conical shape, the quadrangular pyramidal protrusion 320 having a quadrilateral thrust shape, and the trapezoidal protrusion 330 having a trapezoidal shape in cross section is not limited to the inside 31 of the bottom 30. In addition, it can be disposed inside the side surface lower portion 41 and the side surface upper portion 42 in the surface portion 40. In addition, since those inside are curving, it cannot be overemphasized that these protrusion parts are arrange | positioned along the inner surface.

  Next, the stirring device 100 can be disposed in the roaster 10 described above. The stirrer 100 can be detachably disposed through the connecting plate portion 200 disposed in the opening 20 in the roaster 10. That is, the crossing plate portion 200 has a through hole 210 at the center thereof, and the shaft portion 120 in the stirring device 100 is disposed in the through hole 210.

  The stirring device 100 includes a handle portion 110, a shaft portion 120 fixed to the handle portion 110, a bottom plate portion 121, and a wing portion 130, and the wing portion 130 is disposed below the bottom plate portion 121. It has the 1st wing | blade part 131 and the 2nd wing | blade part 141 which were arrange | positioned so that rotation between horizontal directions was possible. Among these, although the said shaft part 120 is arrange | positioned in the through-hole 210, it can also arrange | position through the sleeve part 120a which has a hole in the center. In addition, a semicircular cover 120b may be disposed on the upper portion of the sleeve portion 120a, and a cut (not shown) may be provided in the shaft portion 120 so that the cover 120b is locked to the shaft portion 120. The upper end portion 120c of the shaft portion 120 has a quadrangular cross-sectional shape and is fixed to the handle portion 110 as described above, but the other cross-sectional shape of the shaft portion 120 has a circular shape. Therefore, it has the shaft fitting part 110a which has the square hole in the handle | steering-wheel part 100, and the upper end part 120c in the square hole and the shaft part 120 fits.

  The bottom plate portion 121 has bearing portions 122, 122, 122, 122, and is rotatably arranged by the first bearing portions 132, 132 and the shaft portion 123 in the first wing portion 131. The first wing part 131 can be arranged in the horizontal direction by contacting the bottom plate part 121 with the stopper part 133 protruding in the horizontal direction. This state is an open state. Moreover, the 1st wing | blade part 131 comes to hang down below, and makes this state closed. Accordingly, the first wing portion 131 can be opened and closed with respect to the bottom plate portion 121 (see FIG. 11).

  Similarly, the second wing portion 141 is rotatably arranged by the second bearing portions 142 and 142 and the shaft portion 123, and is fixed to the bottom plate portion 121 by a stop portion 143 protruding substantially horizontally from the second wing portion 141. By making contact, the second wing 141 is positioned in the horizontal direction. This state is an open state. Further, the second wing portion 141 hangs downward, and this state is closed. Therefore, the 2nd wing | blade part 141 can be opened and closed with respect to the baseplate part 121 (refer FIG. 11). Thus, since the first wing part 131 and the second wing part 141 can be opened and closed with respect to the bottom plate part 121, when the stirring device 100 is removed from the roaster 10 after roasting, the first wing part 131 and the second wing part 141 can be opened and closed. Since the part 131 and the second wing part 141 hang down, even if the beans cover the first wing part 131 and the second wing part 141, the stirring device 100 can be easily removed. .

  The first wing part 131 includes a first hook part 135, a first partition part 136, and a first connecting part 137 that connects them. The first hook part 135 has a planar band shape with a certain curvature. ing. The first saddle plate portion 135 is disposed in parallel with the bottom portion 30.

  The first partition 136 is attached to the rear end in the rotational direction of the first flange 135, and the first partition 136 near the first flange front end 135a of the first flange 135. Is connected so as to stand at an angle of approximately 90 degrees with respect to the first rib plate portion 135, and in the vicinity of the first central portion 135 b of the first partition portion 136, The 1st screen part 136 is arrange | positioned so that it may become an angle of 160 degrees gradually. That is, FIG. 11B is a plan view of the wing portion 130, and the first rib plate portion 135 and the first screen portion 136 have substantially the same width, but the first rib plate portion of the first screen portion 136. The angle with respect to 135 is arranged so as to gradually fall from 90 degrees to an angle of 160 degrees.

  Further, the first connecting portion 137 connects the first rib plate tip portion 135 a of the first rib plate portion 135 and the first screen tip portion 136 a of the first screen portion 136. The first connecting portion 137 is disposed at an angle W of approximately 125 degrees with respect to the first rib plate portion 135 when viewed from the front. In addition, although there is no limitation of such an angle, it is preferable to arrange | position so that the angle with the inside of the side lower part 41 with respect to the bottom part 30 may be followed.

  This is because the first rib plate portion 135 in the first wing portion 131 having such a configuration is disposed substantially parallel to the bottom portion 30. When the first wing part 131 rotates, the first slat plate part 135 scoops up the beans. Thereafter, the beans picked up in the vicinity of the first hook plate front end portion 135a ride on the vicinity of the first hook plate front end portion 135a in the first hook plate portion 135 disposed at an angle of approximately 90 degrees in the vicinity thereof. The ridden beans cannot get over the first partition 136 near the first end portion 135a of the first plate and gradually move to the vicinity of the first central portion 135b.

  In addition, the first connecting portion 137 has an angle W with respect to the first rib plate portion 135 in the front view of 125 degrees, and is set to follow the angle of the side lower portion 41 with respect to the bottom portion 30. As a result, it is possible to scrape the beans located near the inside of the lower side surface 41 and move the beans to the vicinity of the central portion as described above.

  The beans that have moved to the vicinity of the first central portion 135b are over the first partition portion 136 in the vicinity of the first central portion 135b because the angle of the portion is an angle of 160 degrees with respect to the first base plate portion 135. Move backwards. A dome-shaped cap 170 is disposed at the center. Due to this cap, the beans that have moved to the vicinity of the central portion move again to the first wing portion 131 or the second wing portion 141, move over the first partition 136 near the first central portion 135b, and move backward.

  The beans that have moved to the vicinity of the first central portion 135b are over the first partition portion 136 near the first central portion 135b, because the angle of the portion is 160 degrees with respect to the first saddle plate portion 135. Move to. In this way, the beans are agitated in the roasting machine 10, and uneven roasting during roasting can be prevented.

  Similarly, the second wing portion 141 includes a second rib plate portion 145, a second screen portion 146, and a second connecting portion 147 connecting them, and the second rib plate portion 145 is a plan view with a certain curvature. It has a band shape. The second saddle plate portion 145 is disposed in parallel with the bottom portion 30.

  The second partition portion 146 is attached to the rear end portion in the rotation direction of the second flange plate portion 145, and the second partition portion 146 is near the second flange plate front end portion 145a of the second flange plate portion 145. Is connected to the second rib plate portion 145 so as to stand at an angle of approximately 90 degrees, and in the vicinity of the second central portion 145b of the second screen portion 146, the second rib plate portion 145 is connected to the second rib plate portion 145. The 2nd screen part 146 is arrange | positioned so that it may become an angle of 160 degrees gradually. That is, FIG. 11B is a plan view of the wing portion 130, and the second rib plate portion 145 and the first screen portion 146 have substantially the same width, but the second rib plate portion of the second screen portion 146. The angle with respect to 145 is arranged so as to gradually fall from 90 degrees to an angle of 160 degrees.

  Further, the second connecting portion 147 connects the second rib plate tip portion 145a of the second rib plate portion 145 and the second rib tip portion 146a of the second screen portion 146. This 2nd connection part 147 is arrange | positioned at the same angle as A of FIG.1 (B), ie, 125 degree | times, the angle with respect to the 2nd collar board part 145 in a front view. In addition, although there is no limitation of such an angle, it is preferable to arrange | position so that the angle with the inside of the side lower part 41 with respect to the bottom part 30 may be followed.

  This is because the second rib plate portion 145 in the second wing portion 141 having such a configuration is disposed substantially parallel to the bottom portion 30. When the second wing portion 141 rotates in the R direction, the second heel plate portion 145 scoops up the beans. Thereafter, the beans picked up in the vicinity of the second rib plate front end portion 145a ride on the vicinity of the second rib plate front end portion 145a in the second screen portion 146 disposed in the vicinity thereof at an angle of approximately 90 degrees. The picked-up beans cannot get over the vicinity of the second partition tip 146a and gradually move to the vicinity of the second center portion 145b.

  Further, the second connecting portion 147 is set to be 125 degrees with respect to the second rib plate portion 145 in the front view, and to follow the angle of the side surface portion. As a result, the beans located in the vicinity of the side surface are scraped out, and as described above, the beans can be moved near the center.

  Since the angle of the second screen part 146 is an angle of 160 degrees with respect to the second rib plate part 145, the beans that have moved near the second center part 145b move the second screen part 146 near the second center part 145b. Get over and move backwards. A dome-shaped cap 170 is disposed at the center. With this cap 170, the beans that have moved to the vicinity of the central portion move again to the first wing portion 131 or the second wing portion 141, move over the second partition portion 146 in the vicinity of the second central portion 145b, and move backward. .

  The roaster 10 having the above-described configuration has the above-described protrusion 300. That is, any one of the conical protrusion 310 having a conical shape, the quadrangular pyramidal protrusion 320 having a quadrilateral thrust shape, the trapezoidal protrusion 330 having a trapezoidal cross-sectional shape, or a mixture thereof can be used. In addition, since the beans can be supported by dots or lines, the beans can be roasted without being scorched. Therefore, conduction heat can be eliminated as much as possible, and radiant heat (far infrared rays) can be utilized to the maximum for roasting. Further, as described above, the beans are agitated in the roasting machine 10, and roasting unevenness when roasting can be prevented. Although not shown, it is also preferable that the shaft portion 1 in the stirring device 100 is configured to be rotated by a motor.

DESCRIPTION OF SYMBOLS 10 Roasting machine 20 Opening part 25 Main body part 30 Bottom part 31 Inner part 40 Side surface part 100 Stirrer 110 Handle part 120 Shaft part 121 Bottom plate part 130 Wing part 200 Crossing plate part 210 Through hole 300 Protrusion part 310 Conical projection part 320 Square Conical protrusion 330 Trapezoidal protrusion

Claims (4)

An opening through which beans can be introduced;
A body connected to the opening, having a predetermined volume for storing the beans, and made of ceramic that generates far-infrared rays when heated, and
A roasting device provided with a plurality of protrusions having a predetermined shape inside the main body. The shape of the plurality of protrusions includes any one of a cone-shaped protrusion having a conical shape, a quadrangular pyramid-shaped protrusion exhibiting a quadrangular pyramid, or a trapezoidal protrusion exhibiting a trapezoidal cross-sectional shape. Roaster. In the opening, arrange a crossing plate portion having a through hole for arranging a stirring device for stirring beans,
The roasting device according to claim 1 or 2, wherein the stirring device for stirring the beans so as to be rotatable is arranged in the through hole through the span plate portion. The roasting device according to claim 3, wherein the stirring device includes a shaft portion disposed in the through hole, and a wing portion disposed on the shaft portion so that the bottom plate portion is disposed so as to be opened and closed.

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