JPH08104305A - Packaging machine - Google Patents

Abstract

PURPOSE: To smoothly pull out a packaging band by operating a plurality of forcible opening means from the end part of a band-guiding frame in order when the packaging band is pulled back for a packaging machine which has a loop-form band-guiding frame and operates the forcible opening means when the band is pulled back. CONSTITUTION: An arch-form guard 20 which is stood on the upper surface of a main body 1 is formed in such a manner that the cross section has a U- shape, and the opening part faces inward. In the guard 20, an approx. rectangular band-guiding frame 11 being formed of a flexible elastic resin is arranged. The band-guiding frame 11 is supported by forcible opening means 15a-15c which are arranged in the vicinities of corner parts 32-34, supporting elements 41, 42 which are arranged in the vicinity of a bottom edge, and springs 58, 58. Then, the forcible opening means 15a-15c operate the band-guiding frame 11 from the end part side in order by a micro-computer. By this method, the packaging band is pulled out from a starting end part 10 or final end part 17 side in order, and wound around an article K to be packaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing machine having a loop-shaped band guide frame, and a packing band which can be smoothly pulled out from the guide frame.

[0002]

2. Description of the Related Art A conventional automatic packing machine is disclosed, for example, in Japanese Utility Model Publication No. 55-43043.
As shown in FIG. 8, a loop-shaped band guide frame (11) made of a flexible material is erected on the upper surface of the main body (1), and the band guide frame (11) has its A concave groove that opens to one side (hereinafter referred to as "band traveling path (12)") is provided in the entire area. The band guide frame (11) is horizontally urged by a spring (not shown) so that the band running path (12) side contacts the fixed wall (13) as shown in FIG.
As a result, the entire area of the band travel path (12) opening is fixed wall (1
It is blocked in 3).

On the band supply side of the band guide frame (11), that is, on the starting end portion (10) side of the band guide frame (11), a forced opening means (forcibly opening the band running path (12) ( 15) is provided, and the forced opening means (15) is composed of a swing arm (150) that holds the band guide frame (11) as shown in FIG. 9 and a solenoid (not shown) that swings the swing arm (150). . Then, the forced opening means (15) elastically deforms the band guide frame (11) in a direction away from the fixed wall (13), so that the packing band (B) is opened in the band traveling path (12). The relative movement is performed so that the packing band (B) escapes from the band traveling path (12).

In this case, as shown in FIG. 8, the object to be packed (K) is placed on the main body (1) and the starting end portion of the band guide frame (11) is placed.
If you supply the packing band (B) from (10),
The tip of (B) travels along the band running path (12) in the band guide frame (11) and reaches the end (17) of the band, and then the tip of the packing band reaches the grip mechanism (18). Held in.
Next, when the packing band (B) starts to be pulled back, the forcible opening means (15) is activated to forcibly open the band running path (12) on the starting end (10) side of the band guide frame (11). Then
The packing band (B) begins to escape from the starting end side of the band guide frame (11), and further the first corner part (32) → the second corner part (33) → the third corner part (34) → the fourth corner part. (35) and the packing band (B) escape in sequence and this is wound around the object to be packed (K).

However, in the above-mentioned conventional one, although the smooth and reliable band escaping operation on the starting end portion (10) side of the band guide frame (11) is ensured, the band escaping operation is smooth in other areas. However, there is a problem that the band escaping operation over the entire band guide frame (11) does not proceed smoothly. The above problems will be described in more detail.

The band guide frame (11) is fixed by the elastic force of the fixed wall (1
It is in contact with 3). Therefore, in the area other than the vicinity of the start end of the band guide frame (11) (the area where the forced opening means (15) is not provided), the band guide frame is tightened by the packing band (B).
The packing band (B) must be escaped while forcibly expanding the abutting portion between the (11) and the fixed wall (13).
Therefore, in such an area, compared to the vicinity of the starting end (10) of the band guide frame (11) where the forced opening means (15) is present, the packing band
It is impossible to ensure the smooth escape operation of (B). The conventional packing machine described above is provided with the forced opening means (15) on the side of the starting end (10) of the band guide frame (11).
1) A type that is provided on the terminal end side (17) side and allows the packing band (B) to escape from the terminal end side (17) side (for example, Japanese Utility Model Sho 62-26327).
No.) has the same problem as above.

The present invention has been made in view of the above points, and is "side wall portion of a band guide frame (11) which is formed of a flexible material in a loop shape and is erected on the upper surface of the main body (1). A band running path (12) in the shape of a groove connected to the entire lengthwise direction of the band running path (12), and the opening of the band running path (12) is brought into contact with a fixed wall to bring it into a closed state. Forced opening means (1) that horizontally moves the band guide frame (11) in the direction away from the wall.
5) is provided, and when the band is pulled back, the above-mentioned forced opening means (15)
It is an object of the present invention to make the packing band (B) escape smoothly over the entire band guide frame (11).

[0008]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is to provide a plurality of forcibly opening means (15) (15) for a band guide frame.
Opening means control circuit which is sequentially arranged along the traveling area of (11) and sequentially operates the forced opening means (15) (15) from the end side of the band guide frame (11) when the packing band (B) is pulled back. Has been established ”.

[0009]

The above technical means operates as follows. When the packing band (B) is fed back into the band running path (12) and then pulled back, the opening means control circuit for activating the forced opening means starts to operate, and the opening means control circuit starts the band guide frame ( From the end side of 11), sequentially operate the forced opening means (15) (15). As a result, the band running path (12) is forcibly opened sequentially from the start end (10) side or the end end (11) side. Then, the respective open portions of the band running path (12) have a function of ensuring the smooth escape of the packing band (B) in the portion, whereby the packing band (B) is released.
(B) sequentially escapes from the start end (10) or end (17) side of the band travel path (12) in accordance with the moving direction of the open position, and this is wound around the object to be packed (K).

[0010]

[Effect] The present invention has the following unique effects. Packing band
As the band (B) is pulled back, the band running path (12) is sequentially opened from one end side thereof, so that the packing band (B) can be smoothly escaped over the entire band guide frame (11).

[0011]

EXAMPLES Next, examples of the present invention described above will be explained.
As shown in Fig. 1, an arch-shaped guard is provided on the upper surface of the main body (1).
(20) is provided upright, the guard (20) is formed in a U-shaped cross section, and the open portion thereof faces inward. A substantially rectangular frame-shaped band guide frame (11) made of a flexible elastic resin is arranged in the guard (20), and the end of the band guide frame (11) on the side of the starting end (10) is located. One end of a guide cylinder (44) faces the section. Further, a pair of rollers (46) (46) is arranged at a position facing the other end of the guide cylinder (44), and further faces the end portion (17) of the band guide frame (11). Band welded part (4
8) is provided, and a band holding portion (49) is further provided in the band escape direction from this.

The band guide frame (11) has a first corner portion (32) to a first corner portion (34) arranged near the first corner portion (32).
~ Third forced opening means (15a) (15b) (15c) (corresponding to the forced opening means (15) described in the technical means section above) and a support (41) arranged near the bottom part (42) and further supported by springs (58) (58). Further, a groove-shaped band running path (12) is formed on one side wall of the band guide frame (11), and the opening of the band running path (12) abuts the inner surface of the guard (20). (See FIG. 2). Also, the lower side (113) (1) of the band guide frame (11)
The opening of the band running path (12) at 14) is in contact with an upright wall (not shown) standing inside the main body (1) to be closed.

The first to third parts arranged in the guard (20)
The forced opening means (15a) (15b) (15c) is configured as shown in FIG. 2, and the solenoid (152) is attached to the base part (151) of the mounting bracket (C) fixed to the inner surface of the guard (20). Installed. The output shaft (153) of the solenoid (152) is a fulcrum shaft.
The support shaft (156) is attached to the swing arm (155) that swings around (154).
Are connected by The swing arm (155) is pulled by a spring (157) on the side opposite to the solenoid (152). That is, the rocker arm (155) and the upright wall (1
A spring (157) is inserted between the pins (P) (P) planted in (59), and this biases the swing arm (155) so that it abuts on the stopper (158). Is there. As shown in FIG. 3, the swinging end of the swinging arm (155) is engaged with a hook (160) formed by bending a metal rod in a U shape from the inside, and further, the hook (160). The tip of the band guide frame (1
It is connected to 1).

Further, as shown in FIGS. 1 and 4, an extruding pin (22) is provided in the vicinity of the first forced opening means (15a) closest to the band supply side, and the extruding pin (22). Is fixed to a fixing portion (not shown) while being loosely inserted in a slit (120) cut from the opening side of the band running path (12) in the band guide frame (11). The push-out pin (22) is
As shown in FIG. 5, in the normal state, it is located at a portion deviated from the band running path (12).

The roller (46) and first to third forced opening means
(15a) (15b) (15c) and the like are controlled by the microcomputer in the order shown in FIG. 6, and the operation of the packing machine will be described below with reference to FIG. First, when the power is turned on, the roller (46) rotates in the forward direction to start feeding the packing band (B) into the band running path (12), and the band (B) is placed near the end (17) of the band guide frame (11). The not shown sensor is the packing band
When the end of band supply can be confirmed by detecting the tip of (B), the process proceeds from step (71) to step (72) to stop the rollers (46) and (46) and also to clamp the band (49).
To hold the end of the packing band (B). As a result, the initial setting work is completed, and the operation of the start switch (not shown) is monitored in this state.

Next, when the object to be packed (K) is placed on the upper surface of the main body (1) and the start switch is operated, this is a step
Confirmed in (73). Then, the start end of the band guide frame (11)
After activating the first forced opening means (15a) located on the (10) side, step (75) is executed to start the reverse rotation of the roller (46). That is, as shown by the phantom line in FIG.
2) By retracting the output shaft (153), the spring (157)
Swing the swing arm (155) against the band guide frame (1
1) is moved to the solenoid (152) side, whereby the opening of the band running path (12) and the wall forming the guard (20) are separated from each other. Then, as shown in FIG. 7, the packing band (B) located in the band running path (12) of the band guide frame (11) comes into contact with the push-out pin (22), and the packing band (B) is Band guide frame
It is prevented from moving with (11). This causes the packing band (B) to escape from the band running path (12). When the band guide frame (11) is moved by the operation of the first forced opening means (15a), from the end portion (10) of the band guide frame (11) to the first forced opening means (15a) part. The band guide frame (11) separates from the guard (20) over the range (see FIG. 4). This allows the packing band in the area
The gap that facilitates the escape of (B) is the band guide frame (11).
The band running path (12) formed between the opposing portions of the guard (20) and the guard (20) is opened.

Next, the roller (46) is reversed while the first forced opening means (15a) is operated (see step (75)) to start the pulling back of the packing band (B). Then, the packing band (B) is connected to the starting end portion (1) of the band guide frame (11).
0) to start the escape, and the escape position is the first forced opening means (15
Proceed from a) toward the second forced opening means (15b). still,
When the packing band (B) is pulled back, this is the band
When escaping from (12), since the lower corner of the open end of the band running path (12) is an inclined surface (115), the packing band (B) is guided to the inclined surface (115). Being a band runway
Escape smoothly from (12).

Next, in step (76), a waiting time of 0.1 second is executed, and then the second forced opening means (15b) is operated (see step (77)). That is, the escape position of the packing band (B) from the band running path (12) is the second forced opening means (15b).
When approaching the portion, the band running path (12) of the portion is opened so that the packing band (B) in the portion can be smoothly escaped. Next, steps (78) and (79) are executed so that the escape position of the packing band (B) is the third forced opening means (15).
c) When approaching the part, the band running path (12) in the part is opened at this time, which facilitates the escape of the packing band (B). Then, when waiting for 3 seconds in step (80), the escape position of the packing band (B) is determined by the continuous reverse movement of the roller (46) during this time so that the end of the band guide frame (11) ( After reaching 17), the packing band (B) is wound around the object to be packed (K) on the main body (1). In the above embodiment, the step (7
6) The functional unit in the microcomputer that executes (78) corresponds to the timepiece device of the invention of claim 2, and the first to third
Forced opening means (15a) (15b) (15c) are sequentially selected and the steps (74) (77) (79) for operating them are executed. Corresponds to the selection circuit of.

Next, in step (81), the band welding part (48) is actuated to fix both ends of the packing band (B) wound around the object to be packed (K) by welding, and to cut it (not shown). By operating the mechanism, the packing band (B) is cut to complete the packing work. In the above embodiment, the first to third corner portions of the band guide frame (11) bent in a rectangular shape.
(32) (33) (34) are connected to the first to third forced opening means (15a) (15b) (15
Since it is opened in c), each forced opening means has a function of opening two adjacent sides of the band guide frame (11). Therefore, an efficient opening operation of the band guide frame (11) can be ensured.

Further, in the above embodiment, the band running path (12) is opened from the starting end portion (10) side of the band guide frame (11), but the third forced opening means (15c) and the second forced opening are provided. Means (15b)
..Operated in the order of, and the end portion (17) of the band running path (12)
You may make it open sequentially from the side. In this case, the packing band (B) is located at the end (1) of the band guide frame (11).
Escape from 7) to the starting end (10) side.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the vicinity of an arrangement portion of the forced opening means (15) in the guard (20).

FIG. 3 is a perspective view of the second and third forced opening means (15b) and the third forced opening means (15c).

FIG. 4 is a perspective view of a first forced opening means (15a) part.

FIG. 5 is an enlarged sectional view of the slit (120) portion.

FIG. 6 is a flowchart illustrating a control operation.

FIG. 7 is an enlarged cross-sectional view of the slit (120) part in a state where the band guide frame (11) is horizontally moved.

FIG. 8 is an explanatory diagram of a conventional example.

FIG. 9 is an explanatory view of a conventional example.

[Explanation of symbols]

 (1) ・ ・ ・ Main body (11) ・ ・ ・ Band guide frame (12) ・ ・ ・ Band running path (15) ・ ・ ・ Forced opening means (B) ・ ・ ・ Packing band

Claims (3)

[Claims] 1. A groove-like groove which is formed of a flexible material in a loop shape and is connected to the side wall portion of a band guide frame (11) standing upright on the upper surface of the main body (1) over the entire longitudinal direction thereof. The band running path (12) is formed, the opening of the band running path (12) is brought into contact with the fixed wall to bring it into a closed state, and the band guide frame (11) is horizontal in a direction away from the fixed wall. In a packing machine provided with a forced opening means (15) for moving and for activating the forced opening means (15) when the band is pulled back, a plurality of the forced opening means (15) (15) are connected to the band guide frame (11). ) Are sequentially arranged along the traveling area of the band), and when the packing band (B) is pulled back, the forced opening means (15) (15) are sequentially arranged from the end side of the band guide frame (11).
A packing machine provided with a control circuit for opening means for activating. 2. A timepiece device for intermittently outputting a pulse signal to an opening means control circuit, and a forcefully opening means for sequentially starting from the end side of the band guide frame (11) every time the pulse signal is output from the timepiece device. (15) The packing machine according to claim 1, further comprising a selection circuit for selecting (15) and activating them, and activating the selection circuit when the packing band (B) is pulled back. 3. The packing machine according to claim 1, wherein the band guide frame (11) is formed in a rectangular frame shape, and the compulsory opening means (15) (15) are located at the corners thereof.