JPH09132204A - Wrapping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately stop at a fixed position a support base of a wrapping device constructed to lower the support base supporting an article wrapped halfway with a wrapping sheet to a predetermined stopping position, and to hold the upper part of the wrapping sheet by nipper to wrap the article. SOLUTION: This device comprises a guide 5 supporting a free vertical movement of a support base 3, a driver 8 working straight along the guide 5 and connected with the support base 3, and an electric motor 55 moving the driver 8. The electric motor 55 lowers the support base 3 to stop at a predetermined stopping position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for agricultural products which wraps a packaged item (for example, vegetables such as lettuce and cabbage, or fruits such as melon and apple) with a packaging sheet.

[0002]

2. Description of the Related Art One example of the above-mentioned packaging device is disclosed in Japanese Patent Laid-Open No. 5-338610. This packaging apparatus is provided with a packaging table (2 in FIGS. 5 and 6 of the publication) provided with an opening (2a in FIGS. 5 and 6 of the publication) through which the object to be packaged falls. A permeable packaging sheet (1 in FIG. 6 of the above publication) is placed in the box, and an operator manually pushes the article to be packaged (A in FIG. 6 of the above publication) into the opening from above to drop it. . As a result, the packaging sheet is squeezed at the outer edge of the opening, and the article to be packaged is supported by the lower support table (3 in FIGS. 5 and 6 of the publication) while being wrapped in the packaging sheet.

After that, the support table supporting the article to be packaged is lowered, and the optical sensor (25, 2 in FIG.
6) The support base is stopped when the object to be packaged has passed the detection position (corresponding to the presence / absence sensor) (see FIG. 4 of the above publication). Next, as shown in FIGS. 2 and 7 of the publication, the holding members (14 and 15 in FIG. 3 of the publication) located on the lateral side of the support stand move toward the packaged object, The upper part of the packaging sheet in the package is sandwiched and narrowed down, whereby the article to be packaged is wrapped in the packaging sheet.
In this case, when the support base is stopped based on the fact that the object to be packaged has passed the detection position of the optical sensor, the stop position of the support base can be changed up and down. In this way, the degree of wrapping of the packaging sheet by the sandwiching member can be changed strongly by moving the position of the upper end of the packaged object closer to the upper sandwiching member or separating it from the lower side (paragraph number [0030 of the above publication. ] Description)).

[0004]

In the above-mentioned packaging device, as shown in FIG. 5 of the above publication, an operation arm (upper and lower swingable around an axis of a horizontal axis (P3 in FIG. 5 of the above publication) (see the above publication). Reference numeral 23 in FIG. 5 is connected to a support base, and an operating cylinder (2 in FIG. 5 of the above publication, which swings and operates this operating arm).
4) is provided so that the support base is moved up and down by the contraction operation of the operation cylinder.

In the air-driven or hydraulically-operated operation cylinders as described above, it may be difficult to maintain a constant expansion / contraction speed due to changes in the characteristics of the driving fluid, temperature changes, and the like. Further, in the structure in which the support base is vertically moved up and down by the vertically swingable operation arm, the swing angle of the operation arm and the lift amount of the support base depend on whether the operation arm is upward or horizontal. The relationship between
In some cases, it may not be possible to accurately stop the support base at a desired stop position.

As a result, when the stop position of the support base is changed up and down as described above to change the wrapping condition of the packaging sheet by the sandwiching member, the support base is accurately stopped at the desired stop position. If it is not possible, it may not be possible to accurately set the wrapping condition of the packaging sheet. The present invention, in a packaging device configured to be able to change the packaging degree of the packaging sheet depending on the stop position after the lowering operation of the support base, so that the packaging degree of the packaging sheet can be set accurately. It is intended to be configured.

[0007]

According to the features of claim 1, for example, as shown in FIG. 6, when the object A to be packaged is supported by the support base 3 while being wrapped in the packaging sheet 1, an electric motor 55 is provided.
By this, the drive member 8 linearly moves along the guide member 5 and the support base 3 is moved down, and when the object A to be packaged passes the detection position of the presence / absence sensor (position of the sandwiching member 14), The electric motor 55 is stopped and the support base 3 stops at that position (stop position).

In this case, compared with an air-driven or hydraulically-operated operating cylinder, it may be difficult to maintain a constant expansion / contraction speed due to the characteristics of the driving fluid, temperature changes, etc. Since it is less affected by changes in temperature, it is easy to keep the operating speed of the electric motor constant, and it is easy to accurately set the stop position of the electric motor (stop position of the support base) to a desired position. Since the support base is configured to be moved down by a drive member that moves linearly along the guide member instead of the vertically swingable operation arm, the relationship between the position of the drive member and the amount of elevation of the support base. Is maintained constant, and the support base can be accurately stopped at a desired stop position.

If the support base can be accurately stopped at a desired stop position by the electric motor and the driving member as described above, when the stop position is changed up and down, the support base is moved to the changed stop position. It can be stopped in the same manner with high precision. As a result, by changing the stop position of the support base up and down, it is possible to accurately change the wrapping condition of the packaging sheet.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(1) FIG. 14 shows the whole of the packaging device, in which one side of the packaging table 2 having the opening 2a in the center allows the packaging sheet 1 wound in a roll to freely rotate by the pair of supporting rollers 33. A cutting mechanism 34 in which a cutter (not shown) for the packaging sheet 1 is installed is disposed between the supporting roller 33 and the packaging table 2 which are supported. A withdrawal mechanism 35 for the packaging sheet 1 is arranged on the opposite side of the packaging table 2, and the withdrawal mechanism 35 is configured to be movable between a withdrawal position shown in FIG. 14 and a nipping position shown in FIG. There is. As shown in FIGS. 6 and 1, below the opening 2a of the packaging table 2,
The support base 3 of the article to be packaged A, the first holding member 14 and the like are arranged.

(2) Next, the structure in the vicinity of the support base 3 arranged below the opening 2a of the packaging base 2 will be described. FIG.
As shown in FIG. 1, the first support member 6 is attached to the pair of left and right guide rails 5 (corresponding to guide members) arranged below the opening 2a of the packaging table 2 so as to be slidable up and down. The support base 3 is supported by a second support member 17 fixed to the upper part of the support 6 so as to be able to fall sideways around the horizontal axis P1.
The support base 3 is configured by bending four sides of a flat plate having a plus shape in a plan view upward, and an elastic material 4 such as sponge or soft rubber is attached to the outer surface of the support base 3.

An upper sprocket 7 and a lower double sprocket 54 are arranged beside the guide rail 5, and the chain 8 is attached to the sprocket 7 and the double sprocket 54.
The (supporting member) is wound, and the bracket 6a of the first supporting member 6 is connected to the chain 8. A chain 56 is wound around an electric motor 55 arranged on the side of the double sprocket 54 and the double sprocket 54, and the electric motor 55 is configured to allow the support base 3 to move up and down. A potentiometer 57 for detecting the angle is provided.

Horizontal axis P3 at the left and right ends of the second support member 17
A pair of holding arms 18 is swingably supported around the holding arms 18, and a horizontally long sponge member 18a is provided at the upper end of the holding arms 18.
Are provided, and springs 19 for biasing the left and right holding arms 18 to swing toward the central support base 3 side are provided. By the electric motor 20 on the first support member 6,
An operation arm 21 that is operated to switch between the vertical position shown in FIG. 6 and the horizontal position shown in FIG. 7 is provided.
Both ends of 1 and the lower ends of the left and right holding arms 18 are connected by a link link 22.

(3) Next, a pair of plate-like first sandwiching members 14 (corresponding to sandwiching members) arranged below the opening 2a of the packaging table 2 and a second sandwiching member 16 (in sandwiching member). (Corresponding), the structure of the heater 9 and the like will be described. As shown in FIGS. 1, 2 and 4, a round bar-shaped first guide rail 23 and a plate-shaped second guide rail 24 are arranged below the packaging table 2 on both sides of the opening 2a. Guide plate 12 on one side
Has been fixed. The boss portion 1 is provided at one end of the pair of support plates 13.
3a is fixed, and the boss portion 13a is fixed to the first guide rail 23.
A roller 13b slidably fitted on the second guide rail 24 is provided on the opposite side of the support plate 13. As a result, the pair of support plates 13 are arranged in
The heater 9 is fixed to each of the pair of support plates 13 so as to be slidably supported in the left-right direction of the paper surface of FIG.

As shown in FIGS. 1 and 2, the electric motor 2
8 is provided with an operation arm 28a that is driven to rotate, and the bracket 25 fixed to the boss portion 13a of the one support plate 13 and the operation arm 28a are linked to each other by a connecting rod 26.
Are connected by The balance arm 27 is swingably supported around the vertical axis P4 of the fixed portion, and the roller 27a at one end of the balance arm 27 is inserted into the recessed portion of the bracket 25, and the other end and the other end of the balance arm 27 are supported. The link rod 29 is connected to the boss 13a of the plate 13.

As shown in FIGS. 1, 2 and 4, the plate-shaped first holding member 14 is slidably supported within the range of the elongated hole 14a by the roller 13c supported by the support plate 13, and A pair of tension springs 32 are connected across the first holding member 14. The plate-shaped second holding member 16 is fixed to the pair of support pins 14b fixed downward to the first holding member 14.

As shown in FIGS. 2 and 4, below the support plate 13 on the side opposite to the guide plate 12, a pair of holding arms 30 (holding members) swinging in a direction orthogonal to the sliding direction of the support plate 13. Equivalent to). The holding arm 30 is swingably supported on the lower side of the support plate 13 around the vertical axis P2 of the fixed portion, and is provided with an elliptical elongated hole 30a. 13d of the roller 13d is inserted into the long hole 30a, and the guide plate 10 that supports the holding arm 30 so as not to face downward is used for both rollers 13d.
It is installed over d.

With the structure described above, when the operation arm 28a is driven to rotate by 180 ° as shown in FIGS. 2 to 3, the support plate 13 on the right side of the paper is slid to the left side of the paper, and the support plate 13 is moved. Together with the first and second clamping members 1
4 and 16 are also slid to the left on the paper surface. In conjunction with this operation, the balance arm 27 swings clockwise in the drawing,
The link rod 29 is pulled rightward on the paper surface, and the support plate 13, the first and second holding members 14, 16 on the left side of the paper surface are slid rightward on the paper surface.

As described above, when the support plate 13 on the right side of the paper of FIG. 2 is slid to the left of the paper, the support plate 1
Interlocking with the movement of the third roller 13d, the pair of holding arms 30 opened up and down in the plane of the drawing are rocked so as to approach each other. When the operation arm 28a is rotationally driven by 180 ° in this way, the upper portion 1a of the packaging sheet 1 is narrowed and sandwiched by the first and second sandwiching members 14, 16 and the sandwiching arm 30.

(4) Next, the pull-out mechanism 35 for automatically pulling out the packaging sheet 1 from the packaging sheet 1 wound in a roll for packaging will be described. As shown in FIGS. 5A and 5B, a pair of support plates 36 are slidably supported by rollers 36 a along the left and right guide rails 2 b of the packaging base 2, and the support plates 36 are left and right over the left and right support plates 36. A book support shaft 37 is erected, and five operation arms 38 are independently fitted to the support shaft 37 so as to be independently swingable. A top plate 39 is erected and connected across the upper ends of the left and right support plates 36,
A spring 40 for urging each holding arm 38 toward the swinging side of the top plate 39 is provided, and the pullout mechanism 35 is configured.

The support shaft 37 is rotatably supported by the support plate 36, and the pair of arms 3 is provided on the left and right of the support shaft 37.
7a is fixed, and one rod 37b is erected and fixed across the left and right arms 37a. A fan-shaped gear 41 is swingably supported by a supporting shaft of a roller 36a of one support plate 36, and a link 42 is installed between the fan-shaped gear 41 and one arm 37a, and the fan-shaped gear 41 is rocked. An electric motor 43 that is driven dynamically is provided. The state shown in FIG. 5 (a) is a state in which the electric motor 43 is driven to push up the rod 37b to pull down each holding arm 38 from the top plate 39. As shown in FIG. On the contrary, when the rod 37b is driven to pull down, the holding arms 38 are lifted to the top plate 39 side by the urging force of the spring 40, and the ends of the packaging sheet 1 are clamped.

As shown in FIGS. 5A and 5B, the packaging table 2
One drive shaft 44 is disposed at one end of the drive shaft 4 and
A pair of drive sprockets 45 are fixed to both ends of the drive shaft 4, and an electric motor 46 that rotationally drives the drive shaft 44 is provided. One driven shaft 47 is provided at the opposite end of the packaging table 2.
Are arranged, and driven sprockets 48 at both ends of the driven shaft 47 are arranged.
Has been fixed. A pair of left and right chains 49 is wound around the left and right drive sprockets 45 and the driven sprockets 48, and the left and right chains 49 are connected to the left and right support plates 36 of the drawer mechanism 35. With the above structure,
By rotating the drive sprocket 45 forward and backward by the electric motor 46, the drawer mechanism 35 is moved along the guide rail 2 b of the packaging table 2.

In this case, as shown in FIGS. 5A and 5B and FIG. 14, a horizontally long rubber-like pressure sensor 58 is attached to the front end of the top plate 39 of the drawer mechanism 35, and the drawer mechanism 35 is From the pull-out position shown in FIG. 14 to FIG.
When an obstacle or the like hits the pressure-sensitive sensor 58 when moving to the holding position shown in FIG.
14 and then the pull-out mechanism 35 is slightly moved to the position shown in FIG.
It is configured to move to the pull-out position side shown in and stop again. As shown in FIGS. 5A and 5B, a flat plate-shaped guide plate 59 for preventing the packaging sheet 1 from floating is provided between the support roller 33 and the cutting mechanism 34. It can be rocked upward about the axis P5 and lifted.

(5) Next, the overall flow of packaging in this packaging apparatus will be described with reference to FIGS. 12 and 13. (5) -1 As shown in FIG. 14, in a state in which one piece of the packaging sheet 1 cut into a predetermined length is placed on the packaging table 2, the operator manually puts the article A to be packaged on the packaging table 2 It is dropped into the opening 2a, and as shown in FIG. 6, the article A to be packaged is wrapped in the packaging sheet 1 to some extent and supported by the support base 3.

As shown in FIG. 14, a pair of push-button type activation switches 50 are arranged on the packaging table 2 at a predetermined interval, and as described above, the article A to be packaged is opened in the opening 2a of the packaging table 2. When the operator simultaneously operates the pair of start switches 50 with both hands (step S1), as shown in FIG.
, The pair of holding arms 18 arranged on both sides of the support base 3 are rocked to the side of the article A to be packaged, and the holding arms 1
The object A to be packaged is held on the support base 3 by 8 (step S2), and the lowering operation of the support base 3 is started by the electric motor 55 (step S3) (corresponding to the first control means), and the timer ( (Not shown) starts counting the set time T1 (step S4). A plurality of rubber plate-shaped auxiliary throttle members 11 are provided below the opening 2a so as to surround the article A to be packaged, and the auxiliary throttle member 11 serves to improve the packaging sheet 1 as the support base 3 is lowered. Squeezed.

As shown in FIG. 1, a plurality of light emitting parts 59a are provided.
The horizontally-long light-emitting device 59 including the light-receiving device 60 and the horizontally-long light-receiving device 60 including the plurality of light-receiving units 60a are arranged so as to face the upper side of the first holding member 14, and the optical sensor 31
(Corresponding to presence sensor) is configured. Light emitter 59
The detection light is emitted from one of the light emitting parts 59a in a fan shape along the horizontal plane, and the detection light from one of the light emitting parts 59a reaches all the light receiving parts 60a of the light receiver 60. It is set so that the detection light passes through substantially the entire upper surface of the holding member 14.

As a result, the set time T1 by the timer is set.
After the end of counting (step S5), the detection light from all the light emitting parts 59a in the light emitting device 59 is received by all the light receiving parts 60a of the light receiving device 60 without being blocked (step S6). It is determined that the upper end of A has just passed the position of the detection light of the optical sensor 31 (the first holding member 14) downward, and the vertical position of the support base 3 at this time is the potentiometer 57 shown in FIG. The upper and lower positions of the support base 3 are detected by the controller and stored in the controller (step S7).

Then, when the potentiometer 57 detects that the support base 3 is further lowered by the electric motor 55 and the support base 3 is lowered by the set length L from the above-mentioned stored vertical position ( In step S8), the electric motor 55 is stopped and the support base 3 is stopped at that position (corresponding to the stop position) (step S9) (corresponding to the second control means). In this state, as shown in FIGS. 7 and 8, the upper end of the article A to be packaged is positioned slightly below the second holding member 16 and the holding arm 30.

In the control device, the set length L can be arbitrarily changed to a short length (corresponding to adjusting means). As a result, when the set length L is set to be long, the stop position of the support base 3 shown in FIGS. 7 and 8 is slightly lower, and the upper end of the article A to be packaged A has the second holding member 16 and the holding arm 30. To move downwards. Therefore, as described in (5) -2, 3 to be described later, the first and second sandwiching members 14 and 16 and the sandwiching arm 30 sandwich the upper portion 1a of the packaging sheet 1, and the packaging sheet 1 receives the packaged object A. When the package A is wrapped, the article A to be packaged is relatively loosely wrapped in the packaging sheet 1.

On the contrary, if the set length L is set to be short, the stop position of the support base 3 shown in FIGS. 7 and 8 will be slightly above, and the upper end of the object to be packaged A will be the second holding member 16 and the holding arm. It will approach 30. Therefore, (5)-
The first and second clamping members 14, 1 as described in 2, 3
6. When the holding arm 30 sandwiches the upper portion 1a of the packaging sheet 1 and the article A to be packaged is wrapped in the packaging sheet 1, the article A is wrapped in the packaging sheet 1 relatively tightly.

(5) -2 When the support base 3 is stopped at the position shown in FIG. 7 as described above, the pair of holding arms 18 are slightly opened (step S10), and the operation shown in FIGS. As shown in 3,
The pair of support plates 13 are slid toward the support base 3 (step S11). In this case, in the state shown in FIG. 4, the support plate 13, the heater 9, and the first and second holding members 1
4, 16 are located on the retreat side, and the tip of the first holding member 14 is located closer to the support base 3 side than the tip of the heater 9 by the tension spring 32 and the roller 13c of the support plate 13 on the retreat side. The tip of the second holding member 16 is located closer to the support base 3 than the tip of the first holding member 14.

In the above state, as shown in FIGS. 2 to 3,
When the support plate 13 is slid to the support base 3 side by the electric motor 28, first, the lower second holding member 16 and the holding arm 30 hold the upper portion 1a of the packaging sheet 1 as shown in FIG. The first and second holding members 14 and 16 are connected to each other by a support pin 14b, and the second holding member 1
Since the tip end of the first holding member 14 is retracted from the tip end of 6, when the second holding member 16 on the lower side sandwiches the upper portion 1a of the packaging sheet 1 and stops, as shown in FIG. The first holding member 14 is slightly separated from the upper portion 1a of the packaging sheet 1 and is in a state of lightly sandwiching the upper portion 1a. Thereby, the article A to be packaged is wrapped in the packaging sheet 1.

Next, when the support plate 13 is further slid to the support base 3 side from the state shown in FIG. 8, the tension spring 32 is extended as shown in FIG.
While the holding members 14 and 16 are strongly pushed toward the holding side of the upper portion 1a of the packaging sheet 1, the heater 9 fixed to the support plate 13 causes the first and second holding members 14 and 16 to move.
The upper portion 1a of the packaging sheet 1 is sandwiched between them (the above corresponds to the third control means).

When the upper portion 1a of the packaging sheet 1 is sandwiched by the first and second sandwiching members 14 and 16 and the sandwiching arm 30, the packaging sheet 1 is entirely lifted upward as shown in FIG. The object to be packaged A itself is also pulled up together with the packaging sheet 1 and floats up.
As a result, the object A to be packaged is tightened, and the wrinkles of the packaging sheet 1 are extended as a whole, so that a clean packaging can be expected. In this case, the holding arm 18 is slightly opened as described above (step S10), and the sponge member 18a of the holding arm 18 is separated from the article A to be packaged and the packaging sheet 1, and the first and second holding members are held. When the holding arms 14 and 16 and the holding arm 30 are advanced to the holding position, the sponge member 18a of the holding arm 18 does not hinder the pulling up of the packaging sheet 1 and the object A to be wrapped, and the holding arm 18
Since the sponge member 18a and the article A to be packaged do not rub against each other,
The article A to be packaged is not damaged.

(5) -3 As shown in FIG. 8, when the article A to be packaged is lifted from the support base 3 as the upper portion 1a of the packaging sheet 1 is sandwiched,
The support base 3 is slightly lifted and the packaged object A is moved to the second position.
The back surfaces of the holding member 16 and the holding arm 30 are lightly pressed (step S12). Next, the upper portion 1a of the packaging sheet 1 is heated by the heater 9 and the upper portion 1a is welded, and the upper portion 1a of the packaging sheet 1 is welded.
The state of a becomes easy to separate (step S13).

When the heating by the heater 9 is completed in the state shown in FIG. 9, the support plate 13 and the heater 9 are slightly separated from the upper portion 1a of the packaging sheet 1 and are operated to stop (step S14). . In this case, FIG.
The tension spring 32 that has been stretched in the state of FIG.
However, the state in which the upper portion 1a of the packaging sheet 1 is sandwiched by the first and second clamping members 14 and 16 is maintained.

In this way, the first and second holding members 14, 1
The state in which the heater 9 is slightly separated from the upper portion 1a of the packaging sheet 1 while the upper portion 1a of the packaging sheet 1 is sandwiched by 6 is maintained for the set time T2 (step S14), During the set time T2, the portion heated by the heater 9 in the upper portion 1a of the packaging sheet 1 is cooled and the welding becomes sufficient. Then, the set time T2 is, for example, 0 seconds, 1 second,
The setting can be arbitrarily changed in multiple steps such as 2 seconds.

In the state shown in FIG.
The pull-out mechanism 35, which has been stopped at the pull-out position shown in Fig. 5, moves to the left side of the drawing and reaches the holding position shown in Fig. 5A,
The top portion 39 and the holding arm 38 of the drawer mechanism 35 clamp the end portion of the packaging sheet 1 (step S1).
9). In this case, as shown in FIGS. 5A and 5B, the support shaft 51 extends across the lower portions of the left and right support plates 36 of the drawer mechanism 35.
And the removal plate 52 is fixed to the center of the support shaft 51.

As a result, as shown in FIG. 10, the upper and lower portions 1a of the packaging sheet 1 are sandwiched by the first and second clamping members 14 and 16, and the heater 9 is operated slightly away from the upper portion 1a of the packaging sheet 1. When the drawer mechanism 35 moves to the sandwiching position side shown in FIG. 5A during the set time T2 which is stopped at, the removal plate 52 of the drawer mechanism 35 moves along the upper surface of the first sandwiching member 14. The removal plate 52 removes the upper portion 1a of the packaging sheet 1 from the article A to be packaged and carries it to the cutting mechanism 34 side. In this case, since the upper and lower portions of the welded portion of the packaging sheet 1 are sandwiched and held by the first and second clamping members 14 and 16, even if the upper portion 1a of the packaging sheet 1 is removed as described above, the welded portion is not welded. The part of is not broken.

When the set time T2 in step S14 has elapsed, the support plate 13, the heater 9, and the first and second holding members 14 and 16 are slid to the retreat side as shown in FIG. 11 (step S15). Next, the holding arm 18
Is opened to the left and right to the original position and operated (step S1
6), the support base 3 is further lowered by the electric motor 55 and laid down sideways, and the article A to be packaged is discharged to the slide stand 15 (see FIG. 14) and collected (step S1).
7). As described above, the packaging of one article to be packaged A is completed, and thereafter, the support base 3 is again raised to the original position shown in FIG. 6 by the electric motor 55 and stopped (step S18).

(5) -4 While the object A to be packaged is packed in the above steps S14 to S18, the drawer mechanism 35 is moved from the pull-out position shown in FIG. 14 to that shown in FIG. Move to the clamping position (during this time, the upper part 1a of the packaging sheet 1
5), the end portion of the roll-shaped packaging sheet 1 is clamped as shown in FIG.
As shown in (b), the pulling-out mechanism 35 starts moving to the right side of the drawing again, and the pulling-out operation of the packaging sheet 1 is started (step S20).

When the drawer mechanism 35 reaches the holding position and holds the end portion of the roll-shaped packaging sheet 1, the lower end of the upper portion 1a of the packaging sheet 1 on the removal plate 52 of the drawer mechanism 35 is the first Since it is caught on the end of the sandwiching member 14, when the pull-out mechanism 35 moves from the sandwiching position to the right in the drawing, the removal plate 52 of the pull-out mechanism 35 is pulled away from the upper portion 1a of the packaging sheet 1 and the packaging sheet 1
The upper part 1 a of the first holding member 14 falls downward from the end of the first holding member 14.

Marks 1b (see FIG. 14) are printed on the wrapping sheet 1 at predetermined intervals, and the drawing mechanism 3 is used.
When the packaging sheet 1 is pulled out by a predetermined length by 5, the mark 1b is also pulled out, the mark 1b is detected by the optical sensor 53, and the drawing mechanism 35 is temporarily stopped (step S21). In this state, the cutting mechanism 34 is used. The packaging sheet 1 is cut (step S22).

When the packaging sheet 1 is cut into a predetermined length as described above, the pulling-out mechanism 35 again starts moving to the right side of the paper in FIG. 14, and the packaging sheet 1 cut into the predetermined length is moved to the right side of the paper. As shown in FIG. 14, the center of the packaging sheet 1 cut into a predetermined length is the packaging table 2 as shown in FIG.
When it reaches the opening 2a, the pull-out mechanism 35 stops at this pull-out position, and the end of the packaging sheet 1 is separated from the top plate 39 and the holding arm 38 of the pull-out mechanism 35 (step S23). As a result, one packaging sheet 1 cut into a predetermined length is placed on the packaging table 2.

[Another Embodiment of the Invention] In the above-mentioned [Embodiment of the Invention], as shown in FIGS.
The packaging sheet 1 is configured to be fastened by welding due to heating of the adhesive tape 6 instead of the heater 9.
You may comprise so that the packaging sheet 1 may be fastened by sticking 1. In this case, as shown in FIG. 15, the support base 62 of the adhesive tape 61 is configured to be pulled out to the outside of the packaging device along the guide rail 63 of the packaging device,
The handle 62a for pulling out the support base 62 is provided on the support base 62, and the guide rail 63 is provided with a stopper 63a that comes into contact with the convex portion 62b fixed to the support base 62. As a result, when the adhesive tape 61 on the support base 62 runs low,
When the support base 62 is pulled out by holding the handle 62a, the support base 6 is moved by the guide rail 63 and the stopper 63a.
2 is held in the pulled-out state, and the adhesive tape 61 of the support base 62 is replaced with a new one during this period.

A double-acting air cylinder 64 may be used as shown in FIG. 16 instead of the electric motor 28 for slidingly operating the first holding member 14 and the like. In this case, a mist separator 67 and a filter regulator 68 that remove oil and water in the air are arranged between the operation valve 65 of the air cylinder 64 and the air pump 66.

In the above-mentioned [Embodiment of the Invention], FIG.
As shown in (a) and (b), a pull-out mechanism 35 and a cutting mechanism 34 for automatically pulling out the packaging sheet 1 are provided. However, such pull-out mechanism 35 and cutting mechanism 34 are eliminated and a predetermined length is obtained. A plurality of the cut packaging sheets 1 may be placed next to the packaging table 2 in a stacked state, and an operator may take out the packaging sheets 1 one by one and place them on the packaging table 2. In the case of such a configuration, since the pull-out mechanism 35 for supporting the removal plate 52 as shown in FIGS. 5A and 5B is eliminated, a dedicated drive mechanism for supporting and operating the removal plate 52 is provided. Configure to prepare.

In the above-described [Embodiment of the Invention], as shown in FIG. 6, the chain 8 is rotationally driven by the electric motor 55 so that the support base 3 is moved up and down. Instead, a screw shaft (corresponding to a driving member) (not shown) is arranged vertically, and the screw shaft is inserted into the female screw portion provided on the bracket 6a.
The support base 3 may be configured to be moved up and down by rotating the support base 5.

[0049]

According to the feature of claim 1, in the packaging apparatus configured so that the wrapping condition of the packaging sheet can be changed depending on the stop position after the lowering operation of the support base, the support base is stopped at a desired position. By configuring so that it can be stopped accurately at the position, the wrapping condition of the packaging sheet can be accurately changed by changing the stop position of the support table up and down. Was able to improve the packaging performance.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a moving drive structure of first and second holding members, a heater, and the like.

FIG. 2 is a plan view showing a moving drive structure of first and second holding members, a holding arm, and a heater.

FIG. 3 is a plan view showing a state in which the first and second holding members and the like are moved to the support base side from the state shown in FIG.

FIG. 4 is a vertical cross-sectional side view showing a moving drive structure of first and second holding members, a holding arm, and a heater.

FIG. 5 is a vertical sectional side view of the packing sheet pulling mechanism and the vicinity of the packing table.

FIG. 6 is a front view of the vicinity of the support table showing a state in which the object to be packaged is pushed into the opening of the packaging table and dropped on the support table.

FIG. 7 is a front view showing a state where the pair of holding arms are closed from the state shown in FIG. 6 and the support base is lowered to the lower side of the first and second holding members.

FIG. 8 is a front view showing a state where the first and second holding members sandwich the upper portion of the packaging sheet when the first and second holding members and the heater are moved to the support base side.

9 is a front view showing a state where the heater sandwiches the upper portion of the packaging sheet from the state shown in FIG.

10 is a front view showing a state in which the upper portion of the packaging sheet is removed by the removal plate of the drawer mechanism after the state shown in FIG.

11 is a front view showing a state in which the first and second holding members and the heater have been moved to the retreat side after the state shown in FIG.

FIG. 12 is a diagram showing the flow of the first half of the entire packaging.

FIG. 13 is a diagram showing the flow of the latter half of the entire packaging.

FIG. 14 is a perspective view showing the entire packaging device.

FIG. 15 is a side view showing a sliding structure of a support base for an adhesive tape in [another embodiment of the invention].

FIG. 16 is a perspective view showing a moving drive structure of the first and second holding members, the heater, etc. in [another embodiment of the invention].

[Explanation of symbols]

 1 Packaging Sheet 1a Upper part of packaging sheet 2 Packaging table 2a Opening of packaging table 3 Support table 5 Guide member 8 Driving member 14,16,30 Clamping member 31 Presence sensor 55 Electric motor A Packaged object

Claims (1)

[Claims] 1. A packaging stand (2) provided with an opening (2a) through which a packaged object (A) is dropped for mounting a packaging sheet (1), and is supported below the opening (2a). When the package (A) is dropped into the opening (2a) from above by providing the table (3), the packaging sheet (1) is squeezed at the outer edge of the opening (2a) and the package (A) is ) Is supported by the support base (3) while being wrapped in a packaging sheet (1), and a guide member (5) for movably supporting the support base (3) in the vertical direction, and A drive member (8) which is linearly operated along a guide member (5) and is connected to the support base (3); an electric motor (55) for moving and operating the drive member (8); Clamping members (14), (16), (30) arranged on the lateral side of the support base (3), and the clamping members (14) in the vertical direction. (16), presence sensor (3 for detecting the presence or absence of articles to be packaged (A) at a position (30)
1) and which operates the electric motor (55) so that the support table (3) supporting the article to be packaged (A) is lowered.
The control means and the detection position of the presence / absence sensor (31) are set to the packaged object (A).
Second control means for stopping the electric motor (55) on the basis of the passage of the holding member (1) to the stopped support base (3).
4), (16), (30) are advanced to the side of the article to be packaged (A), and the upper portion (1a) of the packaging sheet (1) in the article to be packaged (A) is clamped by the holding members (14), ( 16), (3
0) sandwiching and narrowing it down to wrap the object to be packaged (A) in the packaging sheet (1), and the stop position of the support base (3) by the second control means are changed up and down and adjustable. A packaging device equipped with means.