JPH107276A - Bag feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed bags exactly one by one so as to correspond to the material of the bags and changing of the number of residual bags and the like by forming the stopping member of the bags so as to retreat from a delivering roller and a moving part for keeping a prescribed interval between the stopping member and the delivering roller with an elastic member. SOLUTION: A plurality of envelopes 1 aligned vertically and mounted on a hopper part 2 is always pressed with constant pressing force in the forward direction of the hopper part 2 by an energizing means 13. The envelope 1 positioned on the front side is delivered vertical-downward to an outlet 8 at the front bottom part of the hopper part 2 by the rotational driving of the delivering roller 20 of a delivering part 3. At that time, the next envelope 1 which is delivered, overlapped with the envelope 1 positioned on the front side is inhibited from passing through the outlet 8 by a stopping member 32, thus surely delivering envelopes one by one. Where the thickness of the envelope 1, friction coefficient or the like is different, a prescribed interval between the delivering roller 20 and the stopping member 32 changes precisely so as to correspond to it by retreating the stopping member 32 from the delivering roller 20 with the elasticity of a moving part 35 and an elastic member 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag supply apparatus for supplying bags one by one to a processing step of storing contents in a bag, for example.

[0002]

2. Description of the Related Art For example, prior to a processing step of automatically storing and sealing contents inside a bag, or a processing step of automatically printing or the like on the outer surface of the bag, the processing is performed. A bag supply device is provided for supplying one or more bags one by one for each process.

Conventionally, a bag supply apparatus of this type has a hopper 10 on which a plurality of bags 101 can be placed as shown in FIG.
2 and a feeding section 103 for feeding the loaded bag body 101. The hopper 102 constitutes a casing 104 on which the bags 101 are stacked and placed. A discharge port 105 is provided at a bottom corner of one side of the casing 104 (supply side of the bag body) with an interval for discharging one bag body 101. The interval between the outlets 105 is set so that one bag can easily pass without normally passing two bags.

The feeding portion 103 is provided at the bottom side of the hopper portion 102, and is provided at least so as to contact the back surface of the lowermost bag body 101 stacked and mounted on the hopper portion 102. Two feeding rollers 106a, 106
b. Further, one feeding roller 106a is located at a middle position in the discharge direction of the bag 101 placed on the hopper 102, and the other feeding roller 106b is located near the discharge port 105.

[0005] Each of the feed rollers 106a, 106b
Is rotated in the directions of arrows H and I in FIG.
The bags 101 are discharged one by one from the discharge port 105 of the casing 104 and supplied to the subsequent processing steps.

On the top of the bag 101 loaded on the hopper 102, the lower surface of the lowermost bag 101 is placed.
Good contact with each of the feeding rollers 106a and 106b,
The rotation operation of each of the feeding rollers 106a and 106b is
Weight 107 for applying a load to be transmitted to
Is placed.

[0007]

However, in the above-described conventional bag supply apparatus, the interval between the discharge ports 105 is set so that only one bag 101 can easily pass without passing two bags. However, the thickness of the bag body 101 is different depending on various materials, and the discharge port 10 in the conventional configuration is different.
5 is a fixed one, so that there is a problem that a fine adjustment is required each time in order to correspond to various types of bags 101.

Further, the weight and the friction coefficient of the surface of the bag body 101 are different depending on various materials. In the conventional construction, the lowermost bag body 101, which is stacked and placed, is put into a hopper with the respective feeding rollers 106a and 106b. Since the air is discharged from the portion 102, the weight of the bag 101 is particularly heavy,
If the friction between the first and the first 101 increases,
05, the next bag 101 is also discharged at the same time, and there is a possibility that a discharge failure such as a blockage of the discharge port 105 may occur.

In the hopper section 102, the bag 10
1 are stacked and placed, the total weight of the bag 101 changes depending on whether the number of bags 101 is large or small. 101
However, the load abutting on each of the feed rollers 106a and 106b changes, and particularly when the load is small, the feeding cannot be performed sufficiently and a discharge failure occurs.

On the top of the bag 101 loaded on the hopper 102, each of the feed rollers 106
The weight 107 is placed so as to transmit the rotation of the a and b to the bag body 101.
7 cannot cope with a change in the total weight of the bag 101 as described above.

More specifically, if the weight of the weight 107 is set to be lighter when the weight of the bag 101 is large, the weight of the bag
When the number 1 decreases, the bag 101 located at the lowermost position
The contact between the back surface of the roller and the feeding rollers 106a and 106b becomes insufficient, so that the rotation operation of the feeding rollers 106a and 106b is not sufficiently transmitted to the bag body 101. On the other hand,
When the weight of the weight 107 is set to be heavy when the bag 101 is small, the lower bag 101 is crushed when the bag 101 is large, and the next bag 101 is discharged from the outlet 105.
Is discharged at the same time, and the discharge port 105 may be clogged.

Generally, the bag 101 is often packed and delivered in a state of being bundled with a string or the like. For this reason, a part of the bag 101 may be bent. As a result, the thickness of the bag body 101 may partially change, or the overlapping bag bodies 101 and 101 may mesh with each other to cause a discharge failure.

Further, when the bag 101 has a flap like an envelope, the thickness of the bag 101 loaded by the flap becomes uneven, which also causes defective discharge.

In order to solve the above-mentioned problems, the present invention is to surely remove the bags one by one in response to bags of different materials, changes in the number of remaining bags, states of the bags, and the like. It is an object of the present invention to provide a bag supply device capable of discharging and supplying.

[0015]

In order to achieve the above object, a bag supplying apparatus according to the present invention comprises a hopper section 2 for arranging a plurality of bags 1 in an upright state, and placing the hopper 2 thereon. Urging means 13 for pressing the bag 1 in the front direction with a constant pressing force in a front-rear direction with the front and back flat surfaces of the bag 1 aligned and mounted on the portion 2; And provided at a front bottom portion of the hopper 2 by rotating the feeding roller 20 to be in contact with the frontmost bag 1 placed on the hopper 2. The bag 1 at the frontmost position is fed vertically downward to the discharge port 8 and the feeding roller 20 of the feeding unit 3 is disposed at a predetermined interval from the feeding unit 3, and the bag 1 is fed by the feeding unit 3. It comes into contact with the next bag 1 that has been fed out by overlapping with the bag 1 at the frontmost position, and A blocking member 32 for blocking the passage of the bag body 1, with a retractable the blocking member 32 relative to the feeding roller 20, blocking member 32 and the feeding roller 2
Moving part 3 which holds a predetermined distance from zero with an elastic member 37
5 is provided.

Further, the blocking member (32) may be constituted by a roller which is driven to rotate in a direction opposite to the feeding roller (20).

Thus, the plurality of envelopes 1 arranged and placed in a state of being set upright with respect to the hopper section 2 are constantly pressed in the front direction of the hopper section 2 by the urging means 13 with a constant pressing force. You. Then, the envelopes 1 arranged and placed in this manner are
Of the envelope 1 at the forefront position,
Of the hopper 2, the discharge port 8 in the front bottom portion
Is fed vertically downward. At this time, the next bag 1 superposed with the bag 1 at the foremost position and fed out is blocked by the blocking member 32 from passing through the discharge port 8.
Are reliably fed out one by one.

Further, the thickness and the coefficient of friction of the surface of the bag vary depending on the material thereof, or the bag is partially bent and ununiform in thickness due to being bundled and delivered with a string or the like. In this case, due to the elasticity of the moving portion 35 and the elastic member 37, the blocking member 32 retreats with respect to the feeding roller 20, and the predetermined interval between the feeding roller 20 and the blocking member 32 is minutely changed. .

The blocking member 32 is connected to the feeding roller 2.
In the case of a roller which is driven to rotate in a direction opposite to the direction of 0, the next bag body 1 in contact with the roller-shaped blocking member 32 is returned to the hopper portion 2 and is prevented from passing therethrough. .

[0020]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side sectional view showing a bag supply apparatus according to the present invention. FIG. 2A is a plan view of the same device.

The bag supply device in this embodiment is
Automatically prints a message, puts the printing paper on which the message is printed into an envelope 1, writes an address on the envelope 1 as a bag, and applies the mail to a mail creation device that seals the envelope 1. It is. The envelope 1 as a bag is intended for a horizontally long type having a flap 1a on one side of an open portion.

As shown in FIGS. 1 and 2 (a), the bag supplying apparatus includes a hopper 2 for placing a plurality of envelopes 1 and an envelope 1 from the hopper 2 to the above-mentioned post-processing step. And a delivery section 3 for delivering the same.

First, the hopper section 2 is a box body that opens upward, and is configured so that a plurality of envelopes 1 are aligned and placed in an upright state. This hopper section 2
The front and back flat surfaces of the aligned envelopes 1 are respectively set to the front and rear directions, and the bottom plate 4, the left and right side plates 5 and 5, the front plate 6,
And a rear plate 7.

The bottom plate 4 supports the lower end of the envelope 1
It is arranged horizontally.

The left and right side plates 5, 5 are arranged upright with respect to the bottom plate 4 at the same interval as the width of the envelope 1 in order to align the left and right ends of the envelope 1.

The front plate 6 is on the side where the envelope 1 is discharged, and is integrally formed with the left and right side plates 5 and 5 in an upright state with respect to the bottom plate 4. The front end of the bottom plate 4 is formed short under the front plate 6 so that the bottom plate 4
A discharge port 8 through which the envelope 1 is discharged is formed between the front end of the front plate 6 and the lower side of the inner wall surface of the front plate 6 (the front bottom portion of the hopper 2).

Further, at the front end of the bottom plate 4, there is provided a plate-shaped conveyance guide 9 which extends downward and forward and is inclined. Outlet 8
And a narrowed delivery path 10 is formed.

The rear plate 7 includes support plates 11, 5 on the left and right side plates 5, 5.
11 and is provided movably in the front-rear direction while standing upright with respect to the bottom plate 4. Concrete back plate 7
The left and right side plates 5 and 5 are formed with slit-shaped guide holes 5a and 5a formed in the left and right side plates 5 and 5 in parallel to the horizontal plane of the bottom plate 4. Sliders 12, 5 with respect to 5 guide holes 5a, 5a
12 are slidably supported. Also, the support plate 1
1 is provided with a protruding piece 11a extending from the guide hole 5a to the outside of the side plate 5, and a constant tensile force is always applied between the protruding piece 11a and a predetermined portion outside the side plate 5. Is added.

As the biasing means 13, a device using a spring mechanism such as a constant-load spring or a constant-load spring, which does not deform the tension even if the bending is deformed, is mainly used.
The urging means 13 is not limited to a spring mechanism. For example, the urging means 13 may be a motor drive as long as it urges the rear plate 7 upright with respect to the bottom plate 4 with an integral force in the front plate 6 direction. Or a mechanism using a piston.

As a result, the rear plate 7 is urged toward the front plate 6 by a constant tensile force while always maintaining an upright state with respect to the bottom plate 4, and the envelope 1 disposed in the hopper 2 is
Are pressed and urged toward the front plate 6 side by the pulling force of the rear plate 7 to be aligned in a vertically standing state.

On the hopper section 2 side of the front plate 6, an envelope presence / absence detecting means 14 comprising, for example, a microswitch is provided. This envelope presence / absence detection means 14
The detection piece 14a is pressed against the envelope 1 urged by the detection piece 14a to turn on, and the detection piece 14a protrudes from the window hole 7a of the rear plate 7 and turns off when the envelope 1 disappears (the dashed line in FIG. 1). ), The envelope 1 in the hopper 2
Is detected.

On the side of the front conveyance path 10 of the front plate 6, there is provided an envelope feeding detection means 15 composed of, for example, a microswitch. The envelope feeding detection means 15 is turned on when the detection piece 15a is protrudingly arranged in the feeding transport path 10 and the envelope 1 is present in the feeding transport path 10 (indicated by a dashed line in the figure). By turning off the envelope 1 when the envelope 1 is not in the feeding conveyance path 10, the passage of the envelope 1 fed from the hopper 2 is detected.

The envelope presence / absence detecting means 14 and the envelope feeding-out detecting means 15 are not limited to micro switches, but may be other types such as photo sensors.

Next, the feeding section 3 is provided on the front plate 6 side, and includes an upper feeding roller 20a as the feeding roller 20;
And a lower feed roller 20b.

The upper feed roller 20a is made of a material such as rubber having a large coefficient of friction around the upper feed roller 20a.
They are arranged in parallel in a left-right direction via a one-way clutch 24. Then, a part thereof enters the hopper portion 2 and can freely contact the envelope 1 placed in the hopper portion 2. An upper driven gear 25 is provided on the upper rotation shaft 23.

The lower feed roller 20b is made of a material such as rubber having a large coefficient of friction around the lower feed roller 20b.
It is provided solely via a one-way clutch 24. Then, a part thereof enters the feeding transport path 10, and can freely contact the envelope 1 discharged into the feeding transport path 10.

The lower rotating shaft 26 has an intermediate gear 27 formed identically to the upper driven gear 25 and a lower driven gear 2.
8 are provided. The intermediate gear 27 is a drive motor 2
9 and the drive pinion 30
0 is transmitted to the lower rotation shaft 26. Then, the lower driven gear 28 rotates with the rotation of the lower rotation shaft 26 by the intermediate gear 27.

A main drive gear 31 meshing with each of the upper driven gear 25 and the lower driven gear 28 is provided.

Therefore, the rotation of the drive pinion 30 is transmitted to the lower rotation shaft 26 via the intermediate gear 27, so that the lower feed roller 20b rotates, and the rotation of the drive pinion 30 is further driven by the lower rotation shaft 26. From gear 28 to driving gear 3
1 and is transmitted to the upper rotation shaft 23 via the upper driven gear 25, so that the upper feed roller 20a rotates.

The rotation of the upper and lower feed rollers 20a and 20b is controlled by the upper driven gear 25, the intermediate gear 27, and the lower driven gear 28.
Are the same, both have the same rotation speed,
Further, the upper and lower feed rollers 20a and 20b are connected to the driving gear 31.
, They rotate in the same direction.

Incidentally, a reverse roller 32 as a blocking member is disposed in the feeding conveyance path 10 in order to prevent double feeding of the envelope 1. The reverse roller 32 uses a member such as rubber having a smaller coefficient of friction than the upper and lower feeding rollers 20a and 20b around the reverse roller 32.
Inside and below the bottom plate 4, a single unit is fixed to a reversing shaft 33 that is horizontally supported in the left-right direction. Then, a part thereof enters the feeding conveyance path 10 and is arranged opposite to the lower feeding roller 20b at a predetermined interval.

The reversing shaft 33 is provided with a reversing gear 34 formed identically to the upper driven gear 25, the intermediate gear 27 and the lower driven gear 28. The reversing gear 34 is a drive pinion 3 of the drive motor 29 for driving the above-described feeding portion 3.
0 and transmits the rotation of the drive pinion 30 to the reversing shaft 33.

Therefore, the rotation of the drive pinion 30 is transmitted to the reversing shaft 33 via the reversing gear 34, so that the reverse roller 32 rotates. The rotation of the reverse roller 32 is the same as that of the upper and lower feeding rollers 20a and 20b because the reverse gear 34 has the same upper driven gear 25, intermediate gear 27, and lower driven gear 28. Is rotated in the opposite direction to the vertical feed rollers 20a and 20b because the reversing gear 34 meshes with the drive pinion 30.

Here, the reverse roller 32 as a blocking member can be finely moved by a moving portion 35 at a predetermined distance from the lower feed roller 20b, and the configuration thereof will be described below.

First, the reversing shaft 33 has a reversing gear 34 meshing with the drive pinion 30 at one end and a reverse roller 32 at the other end. One end of the reversing shaft 33 is pivotally supported by the side plate 5, and the other end of the reversing shaft 33 is pivotally supported by a swing end 36 a of a swing plate 36 which is a main component of the moving unit 35.

The oscillating plate 36 is pivotally supported by a part of the transport guide 9 forming the feeding transport path 10 together with the lower end of the front plate 6, and the other end of the reversing shaft 33 is pivotally supported. The roller 36a swings forward and backward with respect to the lower feed roller 20b. The swing plate 36 is suspended and supported on the bottom plate 4 side via a suspension spring 37 as an elastic member. Further, the bearing 38 that supports one end of the reversing shaft 33 has a slight backlash, and the other end (reverse roller 32) of the reversing shaft 33 can move with the swing of the swing plate 36. It has become.

Therefore, the moving portion 35 is configured such that the reversing shaft 33 is cantilevered with the bearing 38 at one end as a fulcrum, and the reverse roller 32 is disposed at the other end, which is a free end thereof. The other end of the reversing shaft 33 is a suspension spring 37
And is pivotally supported by a swinging plate 36 suspended from the shaft. Thereby, the reverse roller 32 is held by the elasticity of the suspension spring 37 so as to maintain a predetermined interval between the reverse roller 32 and the lower feeding roller 20b, and is further allowed to retreat with respect to the lower feeding roller 20b.

The reversing shaft 33 is cantilevered with a movable fulcrum as a bearing 38 at one end thereof, and a reversing gear 34 is provided at one end serving as the fulcrum. Therefore, even if the other end (reverse roller 32) moves, the one end (reversing gear 34) hardly moves.
The reversing gear 34 and the drive pinion 30 are not disengaged from each other.

Hereinafter, the bag supplying operation of the bag supplying apparatus configured as described above will be described. First, as shown in FIG. 3, it is detected whether or not the envelope 1 as a bag is placed on the hopper portion 2 (envelope presence / absence detecting means 14 is turned on). The envelope 1 is placed so that the flap 1a for closing the opening is on the upper side, and the flap 1a is bent so as to face the feeding section 3 side.

Next, by the drive of the drive motor 29 shown in FIG.
B, the upper feeding roller 20a and the lower feeding roller 20
As b rotates, the reverse roller 32 reverses as shown by the arrow C in FIG. As a result, the envelope 1 at the foremost position in contact with the upper feeding roller 20a is fed downward. Next, the lower end of the envelope 1 fed downward exits the outlet 8 and is conveyed to the feeding conveyance path 10, and is inserted between the lower feeding roller 20 b and the reverse roller 32.

Here, the envelope 1 at the position next to the foremost position overlaps with the envelope 1 at the foremost position due to friction or the like, and the envelope 1 at the foremost position.
When the sheet is conveyed to the feeding conveyance path 10, the reverse roller 32 is reversed with respect to the rotation of the lower feeding roller 20b. Will be returned.

Next, as shown in FIG.
Is transported in the feeding transport path 10 by the upper feeding roller 20a and the lower feeding roller 20b. In addition, the reverse roller 32 is connected to the upper and lower feeding rollers 20.
a and 20b are rotated in reverse, and come into contact with the envelope 1 at the forefront position, and also try to return the envelope 1 at the forefront position to the hopper portion 2. However, the reverse roller 32 is connected to the suspension spring 37 shown in FIG. 4 does not hinder the conveyance of the envelope 1 by retreating to the lower feed roller 20b as shown by the arrow D in FIG.

Next, as shown in FIG. 4, the envelope 1 conveyed into the feeding conveyance path 10 turns on the envelope feeding detection means 15 by the lower end thereof, and the lower end of the envelope 1 further moves to the feeding conveyance path 1.
0 is positioned in contact with the notch 40a of the notch roller 40 provided outside. The upper feed roller 20a and the lower feed roller 20b continue to rotate for a while after the envelope feed detecting unit 15 is turned on, and stop after a predetermined time until the lower edge of the envelope 1 is aligned with the notch 40a of the notch roller 40.

Here, the notch roller 40 is provided with a notch 40a at a part of its circumference, and is configured to be rotationally driven in the direction of arrow E in FIG. 4 by a driving source such as a stepping motor (not shown). At this time, it is in a state of being not driven to rotate. An auxiliary roller 41 is provided on the side of the notch roller 40 and is urged against the periphery thereof.

Next, as shown in FIG. 5, after the upper feed roller 20a and the lower feed roller 20b are stopped for a predetermined time until the lower edge of the envelope 1 is aligned with the notch portion 40a, the notch roller 40 is moved to the position shown in FIG. It is driven to rotate in the direction of the middle arrow E.

At this time, as shown in FIG. 4, the envelope 1 is still supported in contact with the upper feed roller 20a and the lower feed roller 20b, but the rotation of the notch roller 40 causes the auxiliary roller 41 to get over the notch portion 40a. As a result, as shown in FIG. 5, the sheet is nipped between the periphery of the notch roller 40 and the auxiliary roller 41, and is drawn downward (outside the feeding conveyance path 10).

Further, when the envelope 1 is pulled out of the feeding conveyance path 10, the upper feeding roller 20 which has been in contact with the envelope 1
a and the lower feeding roller 20b are rotated by the one-way clutch 24 in the feeding direction of the envelope 1 (arrows F and G in FIG. 5), so that pulling out of the envelope 1 is not hindered. Further, the rotation of the reverse roller 32 remains stopped, and when the envelope 1 is pulled out, the envelope 1 at the next position is prevented from being pulled out at the same time.

Next, when the envelope 1 is securely pulled out from the feeding conveyance path 10, the envelope feeding detecting means 15 is turned off, the notch roller 40 returns to the standby position shown in FIG. 3, and the next position of the envelope 1 is fed. To wait.

Therefore, in the bag supplying apparatus thus configured, the envelope 1 serving as the bag in the hopper 2 is provided.
Are arranged vertically in a vertical state, so that the total weight of the envelopes 1 does not change when the number of envelopes 1 is large or small. Further, the envelopes 1 aligned and placed on the hopper 2 are constantly pressed by the movable rear plate 7 toward the feeding section 3 with a constant pressing force, and each of the feeding rollers 20
Since the contact state of the envelope 1 with the a and 20b is always constant, the feeding rotation of each of the feeding rollers 20a and 20b can always be transmitted to the envelope 1 in a good state.

Further, since the reverse feed roller 20b is provided with a reverse roller 32 which is driven by a rotation opposite to that of the lower feed roller 20b, when the envelope 1 is fed, the frontmost envelope 1 Then, the next envelope 1 which is superimposed on the envelope 1 is peeled from the envelope 1 at the forefront position and returned to the hopper 2, so that the envelopes 1 can be reliably fed one by one and conveyed.

Further, the reverse roller 32 is
6, the swing plate 36 is suspended and supported by a suspension spring 37, so that the thickness, the friction coefficient of the surface, and the like differ depending on various materials of the envelope 1. Also, with the elasticity of the suspension spring 37, it retreats with respect to the lower feeding roller 20b, and the predetermined distance between the lower feeding roller 20b and the reverse roller 32 moves slightly, so that it is possible to cope with the difference described above and to cause defective discharge. There is no.

Further, the envelopes 1 are packed and delivered by the reverse roller 32 having the above structure, for example, in a state where the envelopes 1 are bundled with strings or the like, and the bags 1 partially bend and the thickness is partially changed, or the bags 1 and 1 overlap each other. The reverse roller 32 is driven by the elasticity of the suspension spring 37 even if the
0b, and the rotation is reversed with respect to the rotation of the lower feed roller 20b.

Incidentally, in the above-described embodiment,
The reverse roller 32 can be adjusted by the adjusting mechanism 50 with respect to the interval with the lower feeding roller 20b and the pressure in the direction of the lower feeding roller 20b. This adjustment mechanism 50
This corresponds to the above-described reciprocating structure of the reverse roller 32.

As shown in FIGS. 1 and 2 (a) and 2 (b), the adjusting mechanism 50 first forms an adjusting window 51 by opening a part of the bottom plate 4 and is continuous with the adjusting window 51. A part thereof is bent stepwise downward to form a horizontal support piece 52. The support piece 52 is provided with a pressing adjustment screw 53 rotatably supported with the screw portion directed downward. The pressing adjustment screw 53 is not screwed to the support piece 52, and is rotated in the left and right direction by a driver from the adjustment window 51.

The rear bottom of the bottom plate 4 has a base end 54.
The variable plate 54 which is pivotally supported so that it can swing vertically.
Is provided. The variable plate 54 has its free end 5
4b is extended to the lower side of the support piece 52,
The pressing adjustment screw 53 is supported by being screwed. Then, the variable plate 54 is
Up and down swing adjustment is performed with the rotation of.

The upper end of the suspension spring 37 described in the structure for moving the reverse roller 32 is attached to the free end 54b of the variable plate 54. The swing plate 36 is configured to be pulled.

Further, an interval adjusting screw 57 is screwed to the support piece 52 with the screw portion directed downward. A fixing nut 58 is screwed to the gap adjusting screw 57 on the upper surface side of the support plate 52. And the interval adjusting screw 57
The tip of the screw portion projects downward from the support piece 52 and contacts the upper surface of the restricting piece 36 b extended from the swing plate 36, so that the swing plate 36 pulled by the suspension spring 37 The swing is regulated.

On the free end side 54b of the variable plate 54, in which the pressing adjustment screw 53 is screwed, a countersunk screw-shaped fixing screw 55 is screwed with the screw portion facing downward. . When the fixing screw 55 is loosened from the variable plate 54, the head 55a is raised, and the support piece 52
It is designed to be in contact with the bottom of In addition, the support piece 5
2, an insertion hole 56 having a smaller diameter than the head 55 a of the fixing screw 55 is formed so that the fixing screw 55 can be rotated from the adjustment window 51.

Therefore, as shown in FIG. 6 (a), by turning the pressing adjustment screw 53 with a screwdriver through the adjustment window 51, the variable plate 54 is adjusted to swing up and down, and accordingly, the suspension spring 37 is pulled. Is adjusted, the pressing of the reverse roller 32 in the direction of the lower feed roller 20b is adjusted. At this time, since the swinging plate 36 has its regulating piece 36b abutting against the gap adjusting screw 57 to regulate its swinging, the adjustment by the pressing adjusting screw 53 only adjusts the expansion and contraction of the suspension spring 37. Will be done.

After the adjustment by the pressing adjustment screw 53,
By turning (loosening) the fixing screw 55 from the adjustment window 51, the head 55a rises and comes into contact with the bottom surface of the support piece 52, so that the rotation of the pressing adjustment screw 53 is locked.

Further, as shown in FIG. 6 (b), by turning (loosening or tightening) the gap adjusting screw 57 with a screwdriver through the adjusting window 51, the tip of the thread portion of the gap adjusting screw 57 moves up and down. As a result, the restricting piece 36b which comes into contact with the tip of the screw portion moves up and down with the pulling of the suspension spring 37, so that the swing plate 36 is swung and the reverse roller 32
And the interval between the lower feed roller 20b and the lower feed roller 20b are adjusted.

After the adjustment by the spacing adjusting screw 57,
By tightening the fixing nut 58 toward the support piece 52, the rotation of the gap adjusting screw 57 is locked.

Therefore, according to the adjusting mechanism 50 described above, the distance between the reverse roller 32 and the lower feed roller 20b and the pressing of the reverse roller 32 in the direction of the lower feed roller 20b can be adjusted.

Here, the magnitude relationship between the friction of the upper and lower feeding rollers 20a and 20b, the friction of the reverse roller 32, and the friction between the envelopes 1 and 1 for reliably transporting the envelopes 1 one by one is as follows.
If (upper and lower feeding rollers 20a and 20b)> (reverse roller 32)> (between envelopes 1 and 1), the envelope 1 is
According to the adjusting mechanism 50, the relative difference between the pressing of the envelope 1 by the rear plate 7 toward the upper and lower feeding rollers 20a and 20b and the pressing of the reverse roller 32 can be varied. This ideal adjustment can be easily performed.

If the predetermined distance between the lower feeding roller 20b and the reverse roller 32 is slightly smaller than the thickness of one envelope 1, the envelope 1 can easily bite between the lower feeding roller 20b and the reverse roller 32. It is ideal, and according to the adjustment mechanism 50, this ideal adjustment can be easily performed.

In the above-described embodiment, the reverse roller 32, which is driven in reverse, is illustrated and described as a blocking member. However, for example, the reverse roller 32 is formed of a plate having a predetermined frictional resistance or a non-driven roller. It may be.

The suspension spring 37 as an elastic member is
Although a coil spring is shown and shown in the drawing, there is no limitation as long as it is an elastic body that is interposed between the swing plate 36 and the variable plate 54 and supports the swing plate 36.

Further, it is described that the envelope 1 is placed on the hopper 2 so that the flap 1a is directed upward and the bent flap 1a is directed toward the upper and lower feeding rollers 20a and 20b. There is no particular limitation as long as the envelopes 1 are vertically aligned and placed.

In the feeding section 3, the feeding roller 20
Has been described as having the upper feeding roller 20a and the lower feeding roller 20b, but the feeding roller 20 may be constituted only by the lower feeding roller 20b. It is possible to obtain

[0080]

As described above, the bag supplying apparatus according to the present invention is configured so that the bags are arranged and placed in the hopper portion in a state of standing upright, and the bag is fed out at the front position. By providing the feeding portion, the total weight of the bag body is not applied to the feeding portion, so that the load applied to the feeding roller of the feeding portion differs depending on whether the number of bags is large or small. Nothing.

The bags arranged and mounted on the hopper are
Since it is configured to always press the feeding portion side with a constant pressing force, the state of contact of the bag with the feeding roller is always constant, and the rotational drive of the feeding roller with respect to the bag is always in a good state. Can be transmitted.

Further, by providing a blocking member provided at a predetermined interval with respect to the feeding roller of the feeding section, when the two bags attempt to pass through the predetermined interval, the feeding roller contacts the feeding roller. Only the bag at the foremost position in contact with passes between the feeding roller and the blocking member, and the next bag that overlaps with the bag at the foremost position contacts the blocking member and passes between the feeding roller and the blocking member. Therefore, the bags can be reliably fed and conveyed one by one.

Further, since the blocking member is made to be able to retreat with respect to the feeding roller via the elastic member by the moving portion, the thickness, the coefficient of friction of the surface and the like differ depending on various materials of the bag body. Alternatively, even if a part is bent and the thickness becomes uneven due to being bundled and delivered with a string or the like, the blocking member is retracted with respect to the feeding roller and the predetermined distance between the feeding roller and the blocking member is increased. Since it is slightly changed, it is possible to cope with the above difference, and there is no possibility of defective discharge.

Further, since the blocking member is constituted by a roller which is driven to rotate in the direction opposite to the feeding roller, the next bag abutting on the roller-shaped blocking member is returned to the hopper 2. , So that the bags can be reliably fed out and conveyed one by one.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a bag supply device according to the present invention.

FIG. 2A is a plan view of the same device. (B) Partial sectional view along line XX in FIG. 2 (a).

FIG. 3 is a side sectional view showing a bag supplying operation.

FIG. 4 is a side sectional view showing a bag supplying operation.

FIG. 5 is a side sectional view showing the bag supplying operation.

FIG. 6A is a side cross-sectional view showing a pressing adjustment operation in an adjustment mechanism of a blocking member. (B) Side sectional drawing which shows the space | interval adjustment operation in the adjustment mechanism of a blocking member.

FIG. 7 is a side sectional view showing a conventional bag supply device.

DESCRIPTION OF SYMBOLS 1 ... bag (envelope), 2 ... hopper, 3 ... feeding part, 8 ... discharge port, 13 ... urging means, 20 ... feeding roller, 20a ... upper feeding roller, 20b ... lower feeding roller , 32 ... blocking member (reverse roller), 35 ... moving part, 37 ... elastic member (suspension spring).

Claims (2)

[Claims] 1. A hopper section (2) on which a plurality of bags (1) are arranged and placed in an upright state, and a front and back flat surface side of the bags arranged and placed on the hopper section. And a biasing means (13) for always pressing the bag body in the forward direction with a constant pressing force, and a urging means (13) provided in front of the hopper section and provided at the foremost position mounted on the hopper section. A feed roller (20) to be brought into contact with the feeder roller, and the feed roller is driven to rotate to feed the bag at the frontmost position vertically downward to a discharge port (8) provided at a front bottom portion of the hopper. A feeding portion (3), which is arranged at a predetermined interval with respect to a feeding roller of the feeding portion, and abuts on the next bag fed out by being superimposed on the frontmost bag fed out by the feeding portion; And a blocking member (32) for blocking the passage of the next bag body, and With a retractable against, the bag supply apparatus, wherein a predetermined distance between the blocking member and the feeding roller shifting unit for holding with a resilient member (37) and (35), by comprising a. 2. The bag supply device according to claim 1, wherein the blocking member (32) is a roller that is driven to rotate in a direction opposite to the feeding roller (20).