JP2025005663A - Packaging device - Google Patents

Abstract

[Problem] To provide a packaging device capable of performing appropriate packaging operations. [Solution] The packaging device includes a drawing means 28 for drawing out a long sheet S0, and a cutting means 29 for cutting the long sheet S0 to obtain a packaging sheet. The drawing means 28 also has an openable holding section 130 for clamping and holding the leading end of the long sheet S0 from above and below at a holding position. The holding section 130 of the drawing means 28 moves toward the holding position in a closed state so that the excess part of the packaging sheet does not get caught, and then opens before arriving at the holding position. [Selected Figure] Fig. 14

Description

The present invention relates to a packaging device.

Conventionally, for example, a packaging device as described in Patent Document 1 below is known.

This conventional packaging device includes a drawing means for drawing out a long sheet wound in a roll, for example, and a cutting means for cutting the long sheet drawn out by the drawing means to obtain a packaging sheet. The drawing means has an openable holding section for holding the long sheet in a holding position, and this holding section moves from the holding release position to the holding position while remaining in an open state.

Japanese Patent Application Publication No. 7-315316

However, in the conventional packaging device described above, the holding portion of the drawing means moves from the holding release position to the holding position while remaining in an open state. For example, depending on the size of the packaged item, the excess portion of the packaging sheet may get caught on the moving holding portion, which may prevent proper packaging.

Therefore, one of the objectives of the present invention is to provide a packaging device that can perform appropriate packaging operations.

A packaging device according to an embodiment of the present invention is a packaging device that packages an item to be packaged in a packaging sheet, and includes a pull-out means for pulling out a long sheet, and a cutting means for cutting the long sheet pulled out by the pull-out means to obtain a packaging sheet, the pull-out means having an openable and closable holding section for holding the long sheet, and the holding section moves toward the holding position in a closed state so that the excess part of the packaging sheet does not get caught.

A packaging device according to an embodiment of the present invention is a packaging device that packages an item to be packaged with a packaging sheet, and includes a pull-out means for pulling out a long sheet, a cutting means for cutting the long sheet pulled out by the pull-out means to obtain a packaging sheet, and a control means for controlling at least the pull-out means and the cutting means, and the pull-out means has an openable and closable holding section for holding the long sheet, and the holding section moves toward a holding position in a closed state under the control of the control means so that the excess portion of the packaging sheet does not get caught, and opens before arriving at the holding position.

According to an embodiment of the present invention, proper packaging operations can be performed.

1 is a perspective view of the front side of a packaging device according to one embodiment of the present invention; FIG. FIG. FIG. 4 is a partial front view of the interior of the packaging device (when the first lifting body is in the raised position). FIG. 2 is a partial front view of the interior of the packaging device (with the first lifting body in the lowered position). FIG. 4 is a side view showing a first lifting and lowering drive means of the packaging device. FIG. 2 is a perspective view showing a supporting means of the packaging device. FIG. 2 is a plan view showing a drawing means and a cutting means of the packaging device. FIG. FIG. FIG. 2 is a front view showing a processing unit (packaging processing section) of the packaging device. FIG. 2 is a partial plan view of the processing means (for explaining the operation of the collection mobile body). FIG. 2 is a partial plan view of the processing means (for explaining the operation of the collection rotating body). 4 is an explanatory diagram of the operation of the drawing means of the packaging device. FIG. 4 is an explanatory diagram of the operation of the drawing means and the cutting means of the packaging device. FIG. 4 is an explanatory diagram of the operation of the drawing means and the supporting means of the packaging device. FIG. 4A and 4B are diagrams for explaining the operation of the packaging device, in which FIG.

One embodiment of the present invention will be described with reference to Figures 1 to 17.

In the figure, reference numeral 1 denotes a packaging device, which is a lettuce packaging machine (vegetable packaging machine) that uses, for example, a rectangular packaging sheet S of a specified dimension to package a spherical product W, such as lettuce.

In other words, the packaging device 1 automatically packages agricultural produce W that has been manually supplied to the inside of the packaging device 1 from the supply port 2 by an operator in a packaging sheet S, and then automatically discharges the packaged agricultural produce W from the discharge port 3 to the outside of the packaging device 1.

The packaging sheet (packaging film) S is obtained by cutting a long sheet S0 pulled out from a roll-shaped sheet roll R into pieces of a specified size, and is, for example, a transparent stretch film made of synthetic resin in which the films adhere to each other by static electricity. The sheet roll R is a long, continuous packaging sheet S0 wound into a roll, and is rotatably supported by the support rollers 5 of the roll support means 4.

As shown in Figs. 1 and 2, the packaging device 1 has a box-shaped device body 11 with a roughly rectangular parallelepiped external shape. An upper plate 12 of the device body 11 is formed with a rectangular upper supply port 13. Below the upper plate 12, a horizontal support plate (packaging sheet support section) 14 is provided to support the packaging sheet S, which is unfolded in a planar shape, in a placed state.

A circular lower supply port 15 is formed in the support plate 14, facing the upper supply port 13. A portion of the lower supply port 15 (the portion on the outer periphery) is covered in an openable and closable manner by a resin plate 16, which is a plurality of elastic plate-like elastic bodies that are elastically deformable and aligned in the circumferential direction of the lower supply port 15. The opposing upper supply port 13 and lower supply port 15 form a supply port 2 that allows an operator to manually supply unpackaged agricultural produce W from above into the device body 11.

A rectangular discharge opening 3 is formed on the rear plate 18 of the device body 11 for discharging the packaged agricultural produce W out of the device body 11. In other words, the packaged agricultural produce W, entirely wrapped in a packaging sheet S, is discharged out of the device body 11 from this discharge opening 3. The agricultural produce W (packaged agricultural produce) discharged from the discharge opening 3 is transported to the next process by a transport means such as a conveyor. Also, for example, the agricultural produce W discharged from the discharge opening 3 may be stored in a container.

A rectangular surplus portion discharge outlet 20 is formed on the right plate 19 of the device body 11 for discharging the surplus portion S1 of the packaging sheet S after packaging outside the device body 11. In other words, the surplus portion (surplus waste that is the surplus part of the packaging sheet) S1 cut off from the upper part of the packaging sheet S in a state in which the agricultural products W are wrapped is discharged from this surplus portion discharge outlet 20 to the outside of the device body 11. The device body 11 is provided with, for example, a manual operation switch (operation means) 21 and a setting panel (setting means) 22.

As shown in FIG. 3, the packaging device 1 is equipped with a support means (receiving section) 25 that receives and supports the unpackaged agricultural produce W supplied from the supply port 2 of the device body 11 via the packaging sheet S and sends the packaged agricultural produce W to the discharge port 3 side and discharges it from the discharge port 3, and a processing means (packaging processing section) 26 that performs a predetermined process (e.g., gathering, cutting, and heat welding) on the upper portion of the packaging sheet S that is wrapped around the agricultural produce W on the support body 33 of the support means 25.

The packaging device 1 further includes an air injection means (air injection section) 27 that injects compressed air from an injection nozzle 23 onto the excess portion S1 (excess film that is excess waste) that has been cut off from the packaging sheet S by the processing means 26, and discharges the excess portion S1 from the excess portion discharge port 20.

The packaging device 1 also includes a pull-out means (sheet pull-out section) 28 that pulls out the long sheet S0 in a pull-out direction (leftward) from the sheet roll R on the support roller 5 of the roll support means 4, and a cutting means (sheet cutting section) 29 that cuts the long sheet S0 pulled out by the pull-out means 28 to obtain a packaging sheet S of a specified dimension (specified length).

As described above, the packaging device 1 includes the device body 11, the roll support means 4, the support means 25, the processing means 26, the air injection means 27, the drawing means 28, and the cutting means 29. The processing means (sliding section) 26 includes at least the collection means 231, the separation means 232, and the heat sealing means 233, as described below.

As shown in Figures 4 to 7, the support means (support sending means) 25 includes a guide body 30 erected on the bottom 17 of the device body 11, a first lifting body 31 that can be raised and lowered and is guided by the guide body 30, a second lifting body 32 that can be raised and lowered on the first lifting body 31, a support body 33 that is rotatably mounted on the second lifting body 32 around a left-right central axis of rotation (rotation fulcrum) L1 and supports the underside of the crop W in a placed state from below via the packaging sheet S, and a pair of left and right holding bodies (clamping bodies) 34 that are rotatably mounted on the first lifting body 31 around a front-rear central axis of rotation (rotation fulcrum) L2 and hold (clamp) the left and right sides of the crop W supported by the support body 33 from both left and right sides via the packaging sheet S.

The support means 25 also includes a first lifting and lowering drive means 36 for raising and lowering the first lifting body 31 relative to the guide body 30, a second lifting and lowering drive means 37 for raising and lowering the second lifting body 32 relative to the first lifting and lowering body 31, a first rotation drive means 38 for rotating the support body 33 about the rotation center axis L1 relative to the second lifting and lowering body 32, and a second rotation drive means 39 for rotating (opening and closing) the left and right holding bodies 34 about the rotation center axis L2 relative to the first lifting and lowering body 31.

The guide body 30 that guides the first lifting body 31 in the up-down direction has a first guide member 51 that is elongated in the up-down direction and has a round bar shape that guides the cylindrical portion 41 of the first lifting body 31, and a second guide member 52 that is elongated in the up-down direction and has a U-shaped frame shape that guides the roller portion 42 of the first lifting body 31.

The first lifting drive means 36 has a motor (drive source) 55 and an endless chain 56 that rotates based on the power from the motor 55. The chain 56 is stretched over upper and lower sprockets 57 that are spaced apart and opposed to each other, and the tension of the chain 56 can be adjusted by a tension adjustment means 58.

The tension adjustment means 58 has a tightener 60 that can rotate around a support shaft 59, and a lower sprocket 57 is attached to the tip of the tightener 60. A connecting rod 61 is connected to the base end of the tightener 60, and this connecting rod 61 is biased upward by an adjustment spring 62. In addition, a mounting plate 63 is attached midway along the chain 56, and the mounting part 43 of the first lifting body 31 is attached to this mounting plate 63.

The first lifting body 31 is raised to a raised position relative to the guide body 30 by the rotation of the chain 56 in one direction based on the power from the motor 55 (see Figure 4), and is lowered to a lowered position relative to the guide body 30 according to the size (height) of the crop W by the rotation of the chain in the other direction based on the power from the motor 55 (see Figure 5).

Here, the raised position is a fixed position that is determined in advance, regardless of the size of the crop W. On the other hand, the lowered position is an arbitrary position (a corresponding lowered position that corresponds to the size of the crop) that is determined according to the size of the crop W.

That is, for example, based on information from optical detection means (photoelectric sensor, etc.) 49 that detects the agricultural produce W supplied from the supply port 2, the control means 50 determines the lowering position according to the size of the agricultural produce W. The control means 50 appropriately controls each driving source (motor, air cylinder, etc.) equipped in the packaging device 1 based on information from various sensors, switches, etc.

The second lifting body 32 has a number of guided parts 65 that can be raised and lowered and are guided by a number of guiding parts 44 (e.g., two on the left and right) of the first lifting body 31, and the upper ends of these rod-shaped guided parts 65 that are elongated in the vertical direction are attached to a horizontal base plate part 66.

The second lifting body 32 has a U-shaped frame 67 that can move up and down relative to the base plate 66, and the support 33 is attached to the U-shaped frame 67 so that it can rotate about the central axis of rotation L1. Although not shown, the U-shaped frame 67 is elastically supported by a shock absorbing spring that serves as a shock absorbing means for absorbing the impact on the crops W when the crops W are placed on the support 33 (when the crops are set on the support), and the inner guide pin of the shock absorbing spring is slidably inserted into the cylindrical shock absorbing guide.

The second lifting and lowering drive means 37 has a lifting and lowering cylinder (drive source) 71, which is an expandable and contractible fluid pressure cylinder. In other words, the second lifting and lowering drive means 37 is composed only of the lifting and lowering cylinder 71. The lifting and lowering cylinder 71 has a cylinder body 72 attached to the first lifting and lowering body 31, and a rod 73 that moves in and out of the cylinder body 72. The tip of the rod 73 is attached to the base plate portion 66 of the second lifting and lowering body 32.

The second lifting body 32 is lowered to a lower position relative to the first lifting body 31 by the contraction of the lifting cylinder 71, and is raised to an upper position relative to the first lifting body 31 by the extension of the lifting cylinder 71. In other words, the second lifting body 31 can be raised and lowered relative to the first lifting body 31, and the support body 33 can be raised and lowered between an upper position and a lower position relative to the holding body 34, so as to be able to handle crops W of different sizes.

The holding body (clamping body) 34 can be opened (not clamping the crop) or closed (clamping the crop from both sides) by rotating about the central axis L2 of rotation relative to the first lifting body 31.

In other words, the pair of holders 34 are closed by synchronous movement toward each other based on rotation about the central axis L2 (closing operation), and are open by synchronous movement away from each other based on rotation about the central axis L2 (opening operation).

The holder 34 has an L-shaped arm 76 that is rotatably mounted on the first lifting body 31 around the central axis of rotation L2, a holder 77 that is provided at the tip of the upper end of the arm 76 and that contacts the side of the crop W via the packaging sheet S when the holder 34 is closed to hold the side, and a roller 78 that is provided at the base end of the lower end of the arm 76 and that contacts the roller contact plate 85 of the second rotation drive means 39 when the holder 34 is open.

The holding portion 77 is composed of, for example, a rectangular holding plate 79 and a cushioning material 80 such as a sponge attached to the holding plate 79 so as to cover the surface of the holding plate 79 (at least the surface that comes into contact with the crop via the packaging sheet).

The second rotation drive means 39 has an opening/closing cylinder (drive source) 81, which is an expandable and contractible fluid pressure cylinder. The opening/closing cylinder 81 has a cylinder body 82 attached to the first lifting body 31, and a rod 83 that moves in and out of the cylinder body 82. A roller contact plate 85 is attached to the tip of the rod 83, which lifts the roller part 78 against the biasing force of a closing spring 84, which is a biasing means. The roller contact plate 85 moves up and down while being guided by a guide pin 86 that extends in the vertical direction.

The closing spring 84 for closing the holding body 34 is installed between the first lifting body 31 and the holding body 34. That is, one end of the closing spring 84 is attached to the spring mounting portion 45 of the first lifting body 31, and the other end is attached to the spring mounting portion 46 of the holding body 34.

Then, the holding body 34 rotates about the central axis L2 relative to the first lifting body 31 as the opening/closing cylinder 81 extends to an open state (see FIG. 4), and receives a biasing force (elastic restoring force) from the closing spring 84 as the opening/closing cylinder 81 contracts to cause the holding body 34 to rotate about the central axis L2 relative to the first lifting body 31 based on this biasing force to a closed state (see FIG. 5).

As shown in FIG. 5, when the holding body 34 is switched from the open state to the closed state, the crops W on the support body 33 are clamped from both the left and right sides by the holding portions (clamping portions) 77 of both holding bodies 34 based on the biasing force of the closing spring 84.

The support body (mounting body) 33 is placed in a first state (a supporting state in which the agricultural products are supported from below) and a second state (a sending state in which the agricultural products are sent to the side) by rotating about the central axis L1 of rotation relative to the second lifting body 32.

In other words, the support 33 is placed in a horizontal first state (where the produce is placed) when rotated in one direction (forward) around the central axis L1, and is placed in a tilted, downward-sloping second state (where the produce is discharged) when rotated in the other direction (rearward) around the central axis L1.

As shown in FIG. 7, in the first state of the support 33, the support 33 supports the underside of the crop W from below via the packaging sheet S in a placed state, but in the second state of the support 33, it has a dish-shaped support part 91 that sends the crop W rearward (sideways) by its own weight, and a downwardly protruding attachment part 92 that protrudes downward from the support part 91. In other words, the support 33 has the attachment part 92 that is attached to the second lifting body 32 so as to be rotatable around the rotation center axis L1, and the support part (receiving part) 91 that is fixed to the upper part of the attachment part 92 and supports the underside of the crop W.

The mounting portion 92 has a mounting plate 94 attached to the underside of the support portion 91 by means of fasteners 93 such as screws (see FIG. 4). A pair of opposing left and right plates 95, spaced apart from each other, protrude downward from both ends of the mounting plate 94. A cylindrical insertion tube 96 extending in the left-right direction is provided in the center of the front-rear direction of both opposing plates 95.

Then, a bolt 97 is inserted into the insertion tube 96, and a nut 98 is screwed onto the bolt 97, so that the mounting part 92 is attached to the U-shaped frame part 67 of the second lifting body 32 so as to be rotatable about the central axis of rotation L1. The line passing through the axis of the shaft part of this bolt 97 is the central axis of rotation L1.

The tip of the rod 123 of the rotation cylinder 121 of the first rotation drive means 38 is rotatably attached to the front ends of both opposing plates 95 of the mounting portion 92 via the mounting means 100. The mounting means 100 is composed of, for example, a bolt 101, a nut 102, and a spacer 103.

The support section 91 supports the crops W from below when the support 33 is in the first state, and sends the crops W rearward when the support 33 is in the second state. It is composed of a dish-shaped support plate (receiving plate) 105 that is cross-shaped when viewed from above, and a cushioning material 106 such as a sponge attached to the support plate 105 so as to cover the surface of the support plate 105 (at least the surface that comes into contact with the crops via the packaging sheet).

Here, the support portion 91 has a rectangular plate-shaped central support portion 107 that supports the center of the underside of the crop W via the packaging sheet S, and rectangular plate-shaped peripheral support portions 108a, 108b that protrude diagonally upward from the four ends (outer edges) of the central support portion 107 on the front, back, left and right sides and support four points of the peripheral portion of the underside of the crop W that are located around the center via the packaging sheet S.

The pair of front and rear peripheral support parts 108a are formed larger than the pair of left and right peripheral support parts 108b. The pair of front and rear peripheral support parts 108a are composed of an inclined portion 109 that is inclined relative to the central support part 107, and a tip portion 110 that is parallel to the central support part 107. The pair of left and right peripheral support parts 108b are composed only of an inclined portion 111 that is inclined relative to the central support part 107. In addition, when the support body 33 is in the first state, the central support part 107 is located along a horizontal plane. On the other hand, when the support body 33 is in the second state, the inclined portion 109 of the front peripheral support part 108a is located along a vertical plane.

The first rotation drive means 38 has a rotation cylinder (drive source) 121, which is an expandable and contractible fluid pressure cylinder. In other words, the first rotation drive means 38 is composed only of the rotation cylinder 121. The rotation cylinder 121 has a cylinder body 122 attached to a cylinder mounting portion 124 of the second lifting body 32, and a rod 123 that moves in and out of the cylinder body 122. The tip of the rod 123 is attached to the mounting portion 92 of the support body 33 via the mounting means 100.

The support 33 rotates about the central axis L1 relative to the second lifting body 32 as the rotating cylinder 121 contracts, resulting in a horizontal first state (support state), and rotates about the central axis L1 relative to the second lifting body 32 as the rotating cylinder 121 expands, resulting in an inclined second state (sending state).

When the support 33 is in the second state, the crops W on the support 91 are sent (discharged) onto the conveying section 127 of the conveying body 126, and then the crops W are conveyed by the inclined conveying section 127 toward the discharge outlet 3 and discharged from the discharge outlet 3 outside the device main body 11.

The transport section 127 of the transport body 126 is composed of, for example, a transport plate 128 that is inclined downward toward the rear, and a cushioning material 129 such as a sponge that is attached to the transport plate 128 so as to cover the upper surface of the transport plate 128.

In addition, in a side view of the support 33 in the first state, the pivot axis (pivot fulcrum) L1 of the support 33 is located on the anti-sending side of the center point (center of the support) P of the central support part 107 of the support part 91, that is, shifted forward from the front-to-rear center position of the central support part 107 in the horizontal position. In other words, in a side view of the support 33 in the first state, the pivot axis L1 is located forward (on the anti-sending side) of a vertical line passing through the center point (center of gravity position) O of the spherical crop W supported in a resting state by the support part 91. In addition, in a plan view, the center point P of the support part 91 and the center point O of the crop W on the support part 91 are aligned (including approximately aligned) with each other.

In addition, in FIG. 7, the cushion material 106 of the support body 33 and the cushion material 80 of the holder 34 are omitted. The three cylinders shown in FIG. 7 (the lifting cylinder 71, the opening/closing cylinder 81, and the rotating cylinder 121) are, for example, air cylinders. Also, in FIG. 5, the packaging sheet S is omitted.

As shown in Figures 8 to 10, the pull-out means 28 includes a pair of guide rods 131, which are longitudinal guide bodies extending from front to back in the left-right direction, a movable body (moving section) 132 that can move left and right along the guide rods 131, and a pair of upper and lower holders 133 and 134 that are provided on each movable body 132 and clamp and hold from above and below the leading end of the long sheet S0 unwound from the sheet roll R.

These pairs of upper holding bodies 133 and lower holding bodies 134 form a holding section (gripping section) 130 that can be opened and closed and can move left and right to hold the leading end of the long sheet S0 by clamping it from above and below at the holding position. The holding section 130 can also be moved between the holding release position and the holding position by the left and right movement of the moving body 132.

The upper holders 133 are fixed to predetermined positions on the movable body 132. Each upper holder 133 has an upper holder 133a on the underside of the tip that contacts the long sheet S0. The lower holders 134 are mounted on the movable body 132 so as to be rotatable in the vertical direction around an axis 135. Each lower holder 134 has a lower holder 134a on the upper side of the tip that contacts the long sheet S0, and the lower holder 134a is biased in an upward direction by a torsion spring 136, which is a biasing means.

Then, based on the biasing force of the torsion spring 136, the leading end of the long sheet S0 is clamped (gripped) from above and below by the upper holding portion 133a of the upper holding body 133 and the lower holding portion 134a of the lower holding body 134. Note that the multiple lower holding bodies 134, which are spaced apart from each other and lined up in the front-rear direction, are integrally connected by a connecting rod 137 that is longitudinal in the front-rear direction.

The pull-out means 28 also includes a movement drive means (movement drive unit) 141 that moves the moving body 132 left and right relative to the guide rod 131, and a rotation drive means (opening/closing drive unit) 142 that rotates the lower holding body 134 up and down about the shaft portion 135 relative to the moving body 132.

The moving drive means 141 has a motor (drive source) 143 and a pair of endless chains 144 (144a, 144b) at the front and rear that rotate based on the power from the motor 143. Each chain 144 is hung on left and right sprockets 145 that are spaced apart and opposed to each other, and the tension can be adjusted by tension adjustment means 146. In addition, a moving body 132 is attached midway along the chain 144, and the slider part 140 of the moving body 132 can slide along the guide rod 131 based on the rotation of the chain 144. The front chain 144a rotates based on the power from the motor 143, while the rear chain 144b rotates in conjunction with the front chain 144a based on the power from the motor 143.

Then, the moving body 132 moves to the right together with the holding part 130 to the holding position (a position close to the cutting means) while being guided by the guide rod 131 by the rotation of the pair of front and rear chains 144 (144a, 144b) in one direction based on the power from the motor 143, and moves to the left together with the holding part 130 to the holding release position (a position away from the cutting means) while being guided by the guide rod 131 by the rotation of the pair of front and rear chains 144 (144a, 144b) in the other direction based on the power from the motor 143.

In other words, the holding section 130 of the pull-out means 28 moves to the holding position together with the moving body 132 as the moving body 132 moves to the right based on the power from the motor 143, and moves to the holding release position together with the moving body 132 as the moving body 132 moves to the left based on the power from the motor 143. Then, by moving to the holding release position, the long sheet S0 clamped by the holding section 130 is pulled out.

The rotation drive means 142 has a cylinder 147 (e.g., a drive source such as an air cylinder) which is an expandable and contractible fluid pressure cylinder. This cylinder 147 has a cylinder body 148 and a rod 149 which moves in and out of this cylinder body 148. A lifting member 151 is fixed to the upper end of the rod 149, and this lifting member 151 is formed with an abutment portion 152 which abuts against the connecting rod 137.

When the lifting member 151 rises due to the extension of the cylinder 147, the abutment portion 152 of the lifting member 151 lifts the connecting rod 137 against the biasing force of the torsion spring 136. As a result, the lower holding body 134 rotates downward about the shaft portion 135, and the lower holding portion 134a of the lower holding body 134 moves away from the upper holding portion 133a of the upper holding body 133, thereby releasing the holding of the long sheet S0 by both holding bodies 133 and 134.

That is, as shown in FIG. 9(b), the holding portion (sheet holding portion) 130 is in an open state in which the lower holding portion 134a is separated from the upper holding portion 133a by the extension operation of the cylinder 147. Also, as shown in FIG. 9(c), the holding portion 130 is in a closed state in which the lower holding portion 134a is close to (including in contact with) the upper holding portion 133a by the contraction operation of the cylinder 147.

The cutting means 29 includes a receiving body 161 fixed to the device body 11, a pressing body 162 that presses the long sheet S0 against the sheet receiving section 160 of the receiving body 161, and a cutting blade 163, which is a plate-shaped cutting body that cuts the long sheet S0 pressed against the sheet receiving section 160 by the pressing body 162 and in direct contact with the sheet receiving section 160 to obtain a packaging sheet S of a predetermined size.

The cutting means 29 also includes a lifting body 165 that can be raised and lowered relative to the receiving body 161 and has a pressing body 162 and a cutting blade 163 attached thereto, and a lifting drive means 166 that raises and lowers the lifting body 165 relative to the receiving body 161. The cutting blade 163 is detachably attached to a blade attachment portion 168 of the lifting body 165 by an attachment tool 167.

The pressing body 162 has multiple (e.g., two) first pressing members 171 located on the pull-out side (left side in the pull-out direction) of the cutting blade 163, and multiple (e.g., two) second pressing members 172 located on the opposite pull-out side (right side in the pull-out direction) of the cutting body 163, i.e., on the sheet roll R side (see FIG. 14).

The first pressing members 171 are attached to the first cylindrical portion 169 of the lifting body 165 so that they can be raised and lowered. Each first pressing member 171 has a plate-shaped first long portion 173 that is long in the left-right direction, and rod portions 174 are provided at multiple locations (for example, two locations) on the upper surface of the first long portion 173, and a first sheet pressing portion 175 made of a soft material such as sponge that does not damage the long sheet S0 is provided on the lower surface of the first long portion 173. In addition, a cylindrical coil spring 176 is provided on the outer periphery of the rod portion 174 as a biasing means that biases the first pressing member 171 downward. The second pressing member 172 is similar to the first pressing member 171.

The receiving body 161 has a flat sheet receiving portion (sheet contact portion) 160 against which the middle portion of the long sheet S0 is pressed with a desired pressure by the pressing body 162 and comes into direct contact, and a sheet supporting portion 155 that supports the long sheet S0.

The sheet receiving section 160 has a plurality of (e.g., six) planar first receiving portions 181 positioned in a line in the front-rear direction at intervals below the first pressing member 171 so as to face the first pressing member 171, and a plurality of (e.g., six) planar second receiving portions 182 positioned in a line in the front-rear direction at intervals below the second pressing member 172 so as to face the second pressing member 172.

A first space 183 is formed between the two adjacent first receiving parts 181, and a second space 184 is formed between the two adjacent second receiving parts 182. When the long sheet S0 is held by the upper holding body 133 and the lower holding body 134 constituting the holding part 130 of the drawing means 28, the lower holding body 134 moves upward and passes through both spaces 183, 184. In addition, a cutting space 185 is formed between the adjacent first receiving part 181 and second receiving part 182, through which the cutting blade 163 moves downward when cutting the long sheet S0 with the cutting blade 163.

Here, each of the multiple first receiving portions 181 of the sheet receiving portion 160 of the receiving body 161 is made of a material to which the packaging sheet S does not stick, that is, a non-metallic material (non-ferrous material, etc.), such as a relatively flexible sheet-like nonwoven fabric 186 made of synthetic resin or the like.

That is, a nonwoven fabric 186 made of a material to which the packaging sheet S made of, for example, stretch film does not adhere is fixedly attached (it may be detachable so as to be replaceable) to the upper part of the convex part 188 of an iron receiving member (cutting frame which is a base member) 187. The upper surface of the non-iron first receiving part 181 made of the nonwoven fabric 186 is located at a lower position than the upper surface of the iron second receiving part 182. The height difference is, for example, 1 mm to 10 mm, preferably 3 mm, and because of this height difference, when the long sheet S0 is drawn by the drawing means 28, the long sheet S0 is drawn in the drawing direction without coming into contact with the upper surface of the first receiving part 181 (the surface of the sheet contact part of the nonwoven fabric).

The lifting drive means 166 also has a cylinder 191 (e.g., a drive source such as an air cylinder) which is an expandable and contractible fluid pressure cylinder. This cylinder 191 has a cylinder body 192 and a rod 193 which moves in and out of this cylinder body 192. A lifting rod 195 which can move up and down along a rod guide 194 is connected to the upper end of the rod 193, and the lifting body 165 is attached to the upper end of this lifting rod 195. A slider portion 190 is attached to a frame portion 189 fixed to the cylinder body 192, and a guide rod 131 is inserted into this slider portion 190.

When the lifting rod 195 is lowered by the contraction of the cylinder 191, the lifting body 165 is lowered toward the long sheet S0 together with the pressing body 162 and the cutting blade 163. As a result, the first pressing member 171 presses the long sheet S0 against the nonwoven fabric 186, which is the first receiving portion 181 of the sheet receiving portion 160 of the receiving body 161, and the second pressing member 172 presses the long sheet S0 against the second receiving portion 182 of the sheet receiving portion 160 of the receiving body 161, and then the cutting blade 163 cuts the long sheet S0 in the pressed state, thereby obtaining a packaging sheet S of the specified dimensions.

In addition, a cutting blade guard 196 that covers the side of the cutting blade 163 is erected on the receiving body 161. A rubber plate 198, which is an elastic body that can be elastically deformed and presses the long sheet S0 against the second receiving portion 182 at its lower end, is attached to a vertical plate portion 197 of the cutting blade guard 196.

When setting a new sheet roll R and passing the long sheet S0 through, pressing the rubber plate pressing member 199 against the biasing force of the spring 200 lifts the bottom end of the rubber plate 198. This allows the operator to easily pass the long sheet S0 between the bottom end of the rubber plate 198 and the second receiving portion 182 (see FIG. 14).

On the other hand, as shown in Figures 11 to 13, the processing means (packaging processing section) 26 performs a predetermined process on the upper portion (the outer peripheral portion in the unfolded state before packaging) of the packaging sheet S that is wrapped around the crop W supported by the support 33 of the support means 25 (wrapping substantially the entire crop), which is located above the crop W on the support 33, and is provided with, for example, a gathering means (gathering section) 231, a separating means (separating section) 232, and a heat-sealing means (heat-sealing section) 233.

The gathering means (converging means) 231 is a means for gathering together the upper portion of the packaging sheet S located above the crop W supported by the support portion 91 of the support 33 in a manner that squeezes the upper portion from the periphery.

The cutting means 232 is a means for cutting the excess portion S1 from the wrapping portion (main body portion) of the packaging sheet S that wraps the entire agricultural produce W by cutting a predetermined cutting position in the upper portion of the packaging sheet S that has been gathered by the gathering means 231, and is composed of, for example, a cutting blade 235.

The heat sealing means 233 is a means for heat sealing (closing) the upper portion of the packaging sheet S that has been gathered by the gathering means 231, which is located slightly below the cutting position, and is composed of, for example, a pair of front and rear heaters 236, 237.

The gathering means 231 includes a pair of guide rods 240, which are elongated rods extending in the front-rear direction, a pair of front and rear gathering mobile bodies, a front gathering mobile body 241 and a rear gathering mobile body 242, which gather the upper portion of the packaging sheet S so as to sandwich it from the front and rear sides by moving (sliding) in a direction toward each other along the guide rods 240, and a pair of left gathering mobile bodies 243 and right gathering mobile bodies 244, which gather the upper portion of the packaging sheet S so as to sandwich it from the left and right sides by rotating in a direction toward each other in conjunction with the gathering mobile bodies 241 and 242.

The collection means 231 also includes a first movement drive means 246 that moves the front collection mobile body 241 back and forth relative to the guide rod 240 between the standby position and the collection position, and a second movement drive means 247 that moves the rear collection mobile body 242 back and forth relative to the guide rod 240 between the standby position and the collection position.

The two collection rotating bodies 243, 244 are of the same configuration and rotate left and right (second direction intersecting with the first direction) in response to the movement of the collection moving bodies 241, 242 in the front-back direction (first direction). In other words, the collection rotating bodies 243, 244 rotate in conjunction with the collection moving bodies 241, 242 which move based on the power from the movement drive means 246, 247. The collection moving bodies and the movement drive means are also of the same configuration, and parts are shared.

First, the front collection movable body 241 has a movable member 251 that slides in the front-rear direction along a guide rod 240, and the guide rod 240 is inserted into slider portions 252 on both the left and right ends of the movable member 251. The movable member 251 is provided with a guide collar 253, a slide plate 254, and a sheet clamping plate 255, and a cutting blade 235 and a heater 236 are attached to the tip side of the sheet clamping plate 255.

The first movement drive means 246 has a cylinder (e.g., a drive source such as an air cylinder) 256, which is an expandable and contractible fluid pressure cylinder, and this cylinder 256 is composed of a cylinder body 258 and a rod 259 that moves in and out of this cylinder body 258. The rear end of a cylinder arm 260 is connected to the tip of the rod 259, and the front end of this cylinder arm 260 is connected to the left end of the moving member 251.

The rear collection movable body 242 has a movable member 261 that slides in the front-rear direction along the guide rod 240, and the guide rod 240 is inserted into slider portions 262 on both the left and right ends of the movable member 261. The movable member 261 is provided with a guide collar 263, a slide plate 264, and a sheet clamping plate 265, and a heater 237 is attached to the tip side of the sheet clamping plate 265. A predetermined portion of the packaging sheet S is clamped and heat-sealed by the front and rear heaters 236, 237.

The second movement drive means 247, like the first movement drive means 246, has a cylinder (e.g., a drive source such as an air cylinder) 266, which is an expandable and contractible fluid pressure cylinder, and this cylinder 266 is composed of a cylinder body 268 and a rod 269 that moves in and out of this cylinder body 268. The front end of a cylinder arm 270 is connected to the tip of the rod 269, and the rear end of this cylinder arm 270 is connected to the right end of the moving member 261. The two left and right guide rods 240 are installed between the front frame 238 and the rear frame 239.

Next, the left-side collecting moving body 243 has multiple, for example, two plate-shaped blade members, an upper blade 271 and a lower blade 272, and the lower blade 272 has a curved long hole portion 273 formed therein. The guide collar (roller portion) 263, which is the insertion portion of the rear collecting moving body 242, is inserted into the long hole portion 273 so as to be able to slide along the long hole portion 273.

The right-side collecting movable body 244 similarly has multiple, for example two, plate-shaped blade members, an upper blade 276 and a lower blade 277, and the lower blade 277 has a curved long hole 278 formed therein. The guide collar (roller portion) 253, which is the insertion portion of the front collecting movable body 241, is inserted into the long hole portion (cam hole portion) 278 so as to be slidable along the long hole portion 278.

A restricting plate (resin plate guide, which is a sagging prevention plate) 280 is attached to the upper wing 276 of the right-side rotating body 244 via a number of support rods 279. The restricting plate (resin plate guide, which is a sagging prevention plate) restricts the downward elastic deformation of the resin plate 16 due to contact with the underside of the resin plate 16 when compressed air is injected by the air injection means 27. In other words, a number of support rods 279 are erected on the upper surface of the upper wing 276 of the right-side rotating body 244, and the restricting plate 280 is fixed to the upper end of the support rod 279 and is positioned near the underside of the resin plate 16.

Here, the left side collecting rotary body (upper and lower blades on the left side) 243, which is one of the pair of collecting rotary bodies 243, 244, can rotate left and right around the first support shaft part (first rotation center) 281, which is the first fulcrum fixedly provided on the rear side of the device main body 11, between the standby position (a separated position that does not overlap with the support part 91 in a plan view) and the collecting position (an approaching position that overlaps with the support part 91 in a plan view).

In contrast, the right-side collecting rotary body (upper and lower blades on the right side) 244, which is the other collecting rotary body of the pair of collecting rotary bodies 243, 244, can rotate left and right around a second support shaft portion (second rotation center) 282, which is a second fulcrum fixedly provided on the front side of the device main body 11, between a standby position (a separated position that does not overlap with the support portion 91 in a plan view) and a collecting position (a close position that overlaps with the support portion 91 in a plan view).

The upper portion of the packaging sheet S is gathered by rotating the left and right collecting rotating bodies 243, 244 toward the collecting position (rotating toward each other), but when the collecting rotating bodies 243, 244 are positioned at the collecting position, a gap 283 of a predetermined dimension is present between the two. The presence of this gap 283 allows the heaters 236, 237 to properly heat-seal the packaging sheet S.

As shown in FIG. 13(a), in a plan view, the first support shaft 281 that rotatably supports the rear end (base end on the first fulcrum side) of the left-side collecting and rotating body 243 and the second support shaft 282 that rotatably supports the front end (base end on the second fulcrum side) of the right-side collecting and rotating body 244 are located at positions that are point-symmetrical with respect to the center point P (center of the crop) of the support part 91 of the support body 33.

In other words, the two support shafts 281, 282 are located on different sides of a straight line La in the left-right direction that passes through the center point P of the support 33 in a plan view, and more specifically, the first support shaft 281 is located behind the straight line La and the second support shaft 282 is located in front of the straight line La. Also, the two support shafts 281, 282 are located on different sides of a straight line Lb in the front-rear direction that passes through the center point P of the support 33 in a plan view, and more specifically, the first support shaft 281 is located to the left of the straight line Lb and the second support shaft 282 is located to the right of the straight line Lb.

The state shown in FIG. 13(a) is a state in which both collection mobile bodies 241, 242 are in the standby position and both collection rotating bodies 243, 244 are also in the standby position so that the crops W can be set from the supply port 2 onto the support portion 91 of the support body 33. When the crops W are set in this state, both cylinders 256, 266 begin to extend (i.e., the collection means begins the collection operation), and this extension causes both collection mobile bodies 241, 242 to move synchronously in directions approaching each other to the collection position, and as a result, the upper portions of the packaging sheet S are gathered from the front and rear by both collection mobile bodies 241, 242.

At the same time, the guide collars 253, 263 slide within the long holes 273, 278, causing the two collection rotating bodies 243, 244 to rotate synchronously around the point-symmetrical support shafts 281, 282 in a direction approaching each other to the collection position, and as a result, the upper portion of the packaging sheet S is collected from the left and right sides by the collection rotating bodies 243, 244.

In this way, the upper portion of the packaging sheet S is gathered by the two gathering mobile bodies 241, 242 and the two gathering rotating bodies 243, 244, and at the end of the gathering operation by the gathering means 231, the cutting blade 235 cuts the desired cutting position in the upper portion of the packaging sheet S to separate the excess portion S1 from the wrapped portion of the packaging sheet S, and the heaters 236, 237 heat-seal and seal the portion of the upper portion of the packaging sheet S that is slightly below the cutting position. As a result, the entire agricultural product W is wrapped in the packaging sheet S sealed by heat sealing, and the packaging is completed. After the packaging is completed, when the cylinders 256, 266 perform a contracting operation, the gathering mobile bodies 241, 242 and the gathering rotating bodies 243, 244 return to their original standby positions.

9A, the packaging device 1 is provided with a plurality of optical detection means (photoelectric sensors, etc.) for detecting the moving body 132 of the drawing means 28, such as a drawing end sensor 301, a middle sensor 302, and an end sensor 303. That is, the sensors 301, 302, and 303 for detecting the moving body 132 are disposed at predetermined positions in the device body 11. In addition, a supply port sensor 304, which is an optical detection means for detecting the hand of an operator who supplies the agricultural product W from the supply port 2 into the device body 11, is disposed near the supply port 2 of the device body 11 (see FIG. 1). The control means 50 appropriately controls each drive source (motor, cylinder, etc.) of the drawing means 28 and the cutting means 29 based on information from these sensors when drawing and cutting the long sheet S0.

Here, the end sensor 303 is disposed at a holding position (a preset holding position) where the holding section 130 of the pull-out means 28 is in a closed state (holding state) and holds the leading end of the long sheet S0. The middle sensor 302 is disposed at a position midway along the movement of the holding section 130 of the pull-out means 28, at a position closer to the holding release position than the support section 91 of the support means 25, i.e., for example, at a position (middle position) to the left of the left-side holding body 34.

The pull-out end sensor 301 is located to the left of the hold release position (a preset position for holding release) where the holding portion 130 of the pull-out means 28 is in the open state (hold release state) and releases the hold on the leading end of the long sheet S0. This pull-out end sensor 301 is a safety sensor to prevent the moving body 132 from overrunning.

Next, the specific operation of the packaging device 1 will be described with reference to Figures 14 to 17.

First, the operation of the pull-out means 28 will be described with reference to FIG. 14.

As shown in FIG. 14(a), before the start of the packaging operation (initial state), the holding portion 130 of the drawing means 28 is stopped in the open release position and waits.

Then, when the packaging operation (packaging process) is started by the worker manually supplying the agricultural produce W, as shown in FIG. 14(b), the holding section 130 closes at the holding release position immediately after the operation starts based on the control of the control means 50, and starts moving toward the holding position while remaining in the closed state.

Next, when the intermediate sensor 302 detects the moving body 132 and turns on as shown in FIG. 14(c), the holding section 130 moves toward the holding position under the control of the control means 50 and opens after passing the intermediate sensor 302 as shown in FIG. 14(d).

That is, for example, the cylinder 147 starts to contract after a set time has elapsed (e.g., 0.5 seconds, which is the timer time) after the intermediate section sensor 302 turns on, and the holding section 130 switches from the closed state to the open state. In other words, while moving toward the holding position, the holding section 130 switches from the closed state to the open state before arriving at the holding position and after the excess section S1 of the packaging sheet S is cut off by the cutting blade 235. Note that the control means 50 may control the cylinder 147, which is the drive section, so that the holding section 130 is automatically changed from the closed state to the open state after the excess section S1 is cut off, for example, without using the intermediate section sensor 302.

Next, as shown in FIG. 14(e), when the end sensor 303 detects the moving body 132 and turns on, the open holding section 130 stops at the holding position based on the control of the control means 50. At this time, the leading end of the long sheet S0 is inserted between the upper holding section 133a and the lower holding section 134a of the open holding section 130.

Next, the operation of the drawing means 28 and the cutting means 29 will be explained with reference to FIG. 15.

As shown in Figures 15(a) and (b), the holding portion 130 of the drawing means 28 is closed at the holding position under the control of the control means 50, and holds (clamps) the leading end of the long sheet S0 from above and below with both holding portions 133a and 134a, and then moves from the holding position to the holding release position. In this way, the long sheet S0 is drawn out from the sheet roll R by the drawing means 28.

Next, as shown in FIG. 15(c), the pressing body 162 of the cutting means 29 presses the long sheet S0 against the receiving body 161, and then the cutting blade 163 cuts the long sheet S0, resulting in a packaging sheet S of a specified size.

Next, as shown in FIG. 15(d), when the holding portion 130 of the drawing means 28 opens to the release position and releases the holding of the leading end of the long sheet S, the packaging sheet S of a specified size falls onto the support plate 14 of the device body 11 under its own weight.

At this time, the packaging sheet S is not stuck (adheres) to the first receiving portion 181 that was pressed by the first pressing member 171, and is smoothly separated from the first receiving portion 181. This allows the operator to properly set the crop W on the support portion 91 of the support 33 via the packaging sheet S.

Next, the operation of the pull-out means 28 and the operation of the support means 25 will be explained with reference to FIG. 16.

As shown in FIG. 16(a), the worker supplies the agricultural produce W held by hand into the device body 11 through the supply port 2, and places the agricultural produce W to be packaged on the support portion 91 of the support 33 of the support means 25.

The crop W is then wrapped almost entirely (except for the central portion of the top surface) in the packaging sheet S and is supported by the support section 91 via the packaging sheet S. However, if the crop W is relatively small, the excess portion (excess sheet) S1 of the packaging sheet S wrapping the crop W becomes excessively large. For this reason, even if the first lifting body 31 descends to the lowered position, part of the excess portion S1 remains on the support plate 14 (the moving area through which the holding section 130 passes).

In addition, after the agricultural product W is set on the support part 91, when the worker removes his/her hand from the supply port 2, the control means 50 starts the packaging operation based on information from the supply port sensor 304.

When the packaging operation starts, as shown in FIG. 16(b), the holding section 130 closes in the release position immediately after the operation starts, and the holding body 34 of the support means 25 holds the crop W from both the left and right sides, while the first lifting body 31 descends.

Next, as shown in FIG. 16(c), the holding section 130 moves toward the holding position while remaining in the closed state so as not to catch the excess portion S1 of the packaging sheet S on the way to the holding position. The first lifting body 31 also moves down to the lowered position and stops, so that the support 33 stops at the desired position according to the size of the crop W. Furthermore, the collecting means 231 of the processing means 26 collects the excess portion S1 of the packaging sheet S (the excess portion before separation).

The state shown in FIG. 16(c) is the state before the moving body 132 passes the position of the intermediate sensor 302. In this state, the gathering by the gathering means 231 is not completed (the gathering operation is in progress), and the separation by the cutting blade 235 and the thermal welding by the heaters 236 and 237 are not completed.

Next, as shown in FIG. 16(d), after the movable body 132 passes the position of the intermediate sensor 302, the holding section 130 moves toward the holding position together with the movable body 132 and opens at a position near the top of the support 33. After that, the holding section 130 moves to the holding position while remaining in the open state, and then closes, performing the pull-out operation of the long sheet S0.

Before the holding section 130 is opened, the gathering by the gathering means 231 is completed, and the separation by the cutting blade 235 and the thermal welding by the heaters 236 and 237 are also completed.

The cut-off excess portion S1 is then blown away by compressed air injected from the injection nozzle 23 of the air injection means 27, and discharged from the excess portion discharge port 20 to the outside of the packaging device 1.

After the agricultural produce W is released from the clamping by the two holding bodies 34 of the support means 25, the fully packaged agricultural produce W on the support part 91 is sent out from above the support part 91 by the support body 33 rotating backward while the first lifting body 31 is stopped in the lowered position, and is discharged from the discharge port 3 to the outside of the packaging device 1.

In this way, the packaging device 1 automatically packages the agricultural produce W using the packaging sheet S, so the operator only needs to sequentially feed the agricultural produce W to be packaged (e.g., lettuce) through the supply port 2.

And according to the packaging device 1 described above, the holding section 130 of the pull-out means 28 moves toward the holding position in a closed state based on the control of the control means 50 so that the excess portion S1 of the packaging sheet S (the excess portion before being cut off) does not get caught on the holding section 130, and is automatically changed from the closed state to the open state before arriving at the holding position. Therefore, the excess portion S1 of the packaging sheet S does not get caught on the moving holding section 130, and appropriate packaging work can be performed.

That is, for example, as shown in FIG. 17(a), when the agricultural product W is relatively small and part of the surplus portion S1 before being cut off remains on the support plate 14, the surplus portion S1 does not get caught on the moving holding portion 130, and appropriate packaging can be performed.

In contrast, as shown in FIG. 17(b), if the holding section 130 is configured to move from the release position to the holding position while remaining in an open state, the surplus portion S1 before being cut off may get caught on the moving holding section 130, which may prevent proper packaging. For example, the surplus portion S1 getting caught on the holding section 130 may cause the crop W to tilt, which may result in insufficient gathering by the gathering means 231 or damage to the crop W by the cutting blade 235 or heaters 236, 237.

In addition, the holding portion 130 of the drawing means 28 moves toward the holding position under the control of the control means 50, and automatically changes from a closed state to an open state before arriving at the holding position and after the excess portion S1 of the packaging sheet S has been cut off, so that appropriate packaging work can be performed efficiently.

The agricultural produce to be packaged is not limited to lettuce (a round vegetable), but may be, for example, cabbage, melon, apple, etc., and may have any shape, etc., and the packaged item may be something other than an agricultural produce.

In addition, the cylinder that is the driving source (driving unit) is not limited to an air cylinder, such as a fluid pressure cylinder, but may be, for example, a hydraulic cylinder, or a driving source such as a motor may be used instead of the cylinder.

In addition, it is preferable that the parts that come into contact with the crops (support parts, holding parts, transport parts, etc.) have elastic cushioning material to cushion the impact on the crops, but cushioning material may not be necessary depending on the type of packaged item, for example.

The holding section of the pull-out means is not limited to a configuration in which the opening operation starts and the pull-out means is in an open state after a set time has elapsed since the detection means, such as the intermediate sensor, is turned on (detected). For example, the holding section may be configured to start the opening operation and be in an open state when the detection means is turned on (detected), or may be configured to automatically perform the opening and closing operation by time control without using the detection means.

Furthermore, the holding portion of the withdrawal means may be configured to open immediately before it reaches the holding position, or immediately after the excess portion is cut off.

It is also possible to configure the holding portion of the drawing means to move to the holding position while remaining in a closed state and then open, so that the leading end of the long sheet is automatically inserted into the holding portion in the open state.

REFERENCE SIGNS LIST 1 Packaging device 28 Pulling means 29 Cutting means 50 Control means 91 Supporting section 130 Holding section 302 Middle sensor as detection means S Packaging sheet S0 Long sheet S1 Surplus section W Agricultural produce as packaged item

Claims (5)

A packaging device that packages an item to be packaged with a packaging sheet,
A drawing means for drawing out the long sheet;
a cutting means for cutting the long sheet drawn out by the drawing means to obtain a packaging sheet,
The drawing means has an openable and closable holding portion for holding a long sheet,
The packaging device, wherein the holding portion moves toward the holding position in a closed state so as not to catch an excess portion of the packaging sheet. A packaging device that packages an item to be packaged with a packaging sheet,
A drawing means for drawing out the long sheet;
a cutting means for cutting the long sheet drawn out by the drawing means to obtain a packaging sheet;
A control means for controlling at least the drawing means and the cutting means,
The drawing means has an openable and closable holding portion for holding a long sheet,
The packaging device is characterized in that the holding portion moves toward the holding position in a closed state so as not to get caught on the excess portion of the packaging sheet, based on the control of the control means, and becomes in an open state before arriving at the holding position. A detection means is provided in the middle of the movement of the holding part,
3. The packaging device according to claim 2, wherein the control means changes the holding portion from a closed state to an open state based on information from the detection means. 4. The packaging device according to claim 3, wherein the detection means is disposed on the side of the support portion that supports the packaged item via the packaging sheet, closer to the holding release position. 5. The packaging device according to claim 1, wherein the holding portion moves toward the holding position and opens before arriving at the holding position and after an excess portion of the packaging sheet is cut off.

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