JPS6245895Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an improvement of a device for preventing adhesion of a seal portion in a bag making machine such as a heat-fusible synthetic resin bag making machine.

Conventional technology The conventional bag making machine for making heat-fusible synthetic resin bags is
The configuration is as shown in the figure. In the figure, reference numeral 1 denotes a bag material folded flat, and the bag material 1 is pulled out by a fixed length from its supply source by a transfer device consisting of a pair of intermittently rotating transfer rolls 2.
When the fusion-cutting device consisting of a fixed pedestal 3 and a fusion-cutting head 4 is stopped on the fixed pedestal 3, the fusion-cutting head 4 is lowered and the two provided on the fusion-cutting head 4 are stopped. two electric heating elements 5 and a fusing knife 6 provided between them
sealing and cutting are performed. At this time, the tip of the cut bag 7 reaches the bag receiver 8, the approximate center of the bag 7 is located on the holder 10 having the pair of piercing needles 9, and the pressing tool 11 is lowered. ,
It is held by a piercing needle 9. After the welding and cutting of the bag material 1 is completed, when the welding and cutting head 4 returns to its original position and starts to return upward, pressurized air is supplied to the air injection pipe 12, and the bag body 7 separated from the bag material 1 is The seal portion 7a side of the bag body 7 is pressed down, and the end of the bag body 7 is placed between the fixed pedestal 3, the welding-cutting device consisting of the welding-cutting head 4, and the bag body receiving tool 8, and then stopped. It falls between the frame bars 14 of the frame car 13 that is being moved. The frame wheel 13 is rotated by an intermittent rotation mechanism before the seal portion 7a of the bag body 7 to be manufactured next falls, and the frame wheel 13 rotates the seal portion 7a of the bag body 7 located between the frame rods 14 between the frame rods 1.
4. Send it outside and stack it on the bag body 7 manufactured earlier.

However, such a device for preventing adhesion of the seal portion consisting of the frame wheel 13 and the frame rod 14 has a poor cooling effect, and the bags 7 overlap one after another before the seal portion 7a of the bag body 7 is completely cooled down. In some cases, the seal portions 7a adhered to each other.

Further, a long flat cylindrical body is introduced into a bag-making device from one end thereof and sequentially cut into a predetermined length, and at least one of the cut parts is sealed to form a large number of bags. , the large number of bags are collected and bundled in a bundling device provided in front of the bag making device, a rotary body rotatable along a vertical plane is provided at least on one of the front and rear sides of the bundling device, and the rotary body A plurality of interposers are arranged in a radial manner, and by rotating the rotating body, the sealed portion of each bag sent to the bundling device is positioned between each interposer, and each bag immediately after being sealed is placed between the interposers. A sealing part separating device for a bag making machine which separates the sealing parts of a bag body has been proposed in Japanese Utility Model Application Publication No. 57-43153.

However, this method only separates the sealed portion of the bag between intervening bodies arranged radially on the rotating body to prevent the sealed portion from adhering, and several bags are manufactured. Since the interposer is locked by a stopper for a certain period of time to cool the sealed portion of the bag, cooling of the sealed portion by the interposer is slow, resulting in poor bag manufacturing efficiency.

Problems to be Solved by the Invention In view of the above-mentioned problems, the purpose of the invention is to operate the rotating device immediately when the sealing part of the bag is lowered, to bring the presser blade into contact with the front cooling blade, and to place the presser blade in contact with the cooling blade in front of the receiver. Before the bags are stacked, the sealed parts of each bag are securely held from both sides and cooled stably, thereby preventing the sealed parts from adhering to each other.
Moreover, compared to the conventional method in which the sealed part of the bag body is cooled by separating it between the cooling vanes, the sealed part is in direct contact with the cooling vanes cooled by the water flow, and heat is removed well. It is an object of the present invention to provide a device for preventing adhesion of a seal portion in a bag-making machine, which allows rapid cooling and improves bag-making efficiency.

Means for Solving the Problems The seal part adhesion prevention device in the bag making machine of the present invention comprises a fusing-cutting device, a transfer device for supplying bag material to the fusing-cutting device, and a cut bag body. In a bag making machine having a receiving device for holding a holder, a rotating shaft having a hollow portion provided with a plurality of hollow cooling blades projecting radially is disposed between the fusing-cutting device and the receiving device. A presser blade is disposed between the cooling blades, a rotation device is provided for bringing the presser blade into contact with a rear cooling blade and a front cooling blade, and a water pipe is connected to the rotation shaft. It has a configuration that

Function: The bag material is supplied to the fusion-cutting device by the transfer device, and the seal portion of the fused-cut bag by the fusion-cutting device holds the fusion-cutting device and the cut bag. It descends between a plurality of radially protruding hollow cooling vanes disposed between the receiving device and the cooling blade.
Then, with the intermittent rotation of the rotary shaft having a hollow part provided with cooling blades, the presser blades placed between the cooling blades, which were rotating in contact with the rear cooling blade,
When the rotating device is activated, it moves so as to come into contact with the front cooling blade, and the seal portion of the bag is held in contact with the cooled cooling blade by connecting the water pipe to the rotating shaft.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 is a schematic side sectional view of a bag making machine equipped with a seal adhesion prevention device according to an embodiment of the present invention, FIG. 3 is an enlarged sectional view of the main part of FIG. 2, and FIG. line A
-A sectional view.

As in Fig. 1, the bag making machine is fused to the fixed pedestal 3.
Welding consisting of cut head 4 - cutting device and said welding -
It has a transfer device consisting of a pair of transfer rolls 2 that supplies the bag material 1 to the cutting device, and a bag body receiver 8 that holds the bag body 7 cut by the fusing-cutting device, - A seal part adhesion prevention device 15 is provided between the cutting device and the bag body receiver 8 in place of the conventional seal part adhesion prevention device consisting of a frame wheel and a frame rod shown in FIG. Since the configuration is exactly the same as that in FIG. 1, the same parts are given the same reference numerals and the explanation will be omitted.

The seal portion adhesion prevention device 15 is provided with a plurality of hollow cooling blades 18 that protrude radially from the outer periphery of a rotating shaft 17 having a hollow portion 16, and a presser blade 23 is provided between each of the cooling blades 18. It is provided. 24 is a rotation axis of the presser blade 23.

The inside 19 of the cooling vane 18 is opened into the hollow part 16, and the hollow part 16 of the rotation shaft 17 has two water passage pipes 20a, 2 on the left and right through which water flows in the direction of the arrow in FIG.
0b are respectively concatenated. 21 is the rotation axis 17
A gear 22 fixed to is a bearing mounted on the rotating shaft 17, and the cooling vane 18 rotates continuously or intermittently in the direction of the arrow in FIG. 3.

FIG. 5 is a cross-sectional view taken along the line B-B in FIG. The follower 25 and the cam 26 form a rotating device that brings the presser blade 23 into contact from the rear cooling blade 18 to the front cooling blade 18 . The cam 26 is connected to the rotating shaft 1 via a bearing 27.
A moving rod 28 is attached to the cam 7 and rotates the cam 26.

Next, the operation of this embodiment will be explained. Bag material 1 sent by a certain length by a pair of transfer rolls 2
is sealed and cut by a fusion-cutting head 4 on a fixed pedestal 3. Then, pressurized air is supplied to the air injection pipe 12, and the downward air coming out from the small hole in the lower surface seals the sealing part 7a of the bag body 7.
is pushed down, and the interior 1 of the seal portion adhesion prevention device 15 is drawn down through the hollow portion 16 of the rotary shaft 17 through the water pipes 20a and 20b connected to the rotary shaft 17.
It descends between the cooling vanes 18 through which water is passed.

Next, the moving rod 28 moves upward, and the cam 26 rotates in the direction of the arrow in FIG. 5, in the opposite direction to the rotation of the cooling vane 18. Then, the follower 25 rotates in the same direction as the rotation of the cooling blade 18, and the cooled presser blade 23, which was in contact with the rear cooling blade 18,
It moves in the same direction as the rotation of the cooling blade 18 and comes into contact with the cooling blade 18 in front, and the cooling blade 18 and the presser blade 23
As a result, the sealed portion 7a of the bag body 7 is held from both sides, and the inner portion 19 of the sealed portion 7a is directly connected to the cooling blade 18 through which water is passed through the hollow portion 16 of the rotating shaft 17 by the water pipes 20a and 20b. cooled in contact with the The cooling blades 18 and the pressing blades 23 rotate while holding the seal portion 7a of the bag 7, but since the bag 7 is held by the piercing needle 9 provided in the holder 10, the cooling blades eventually At this time, the sealed portion 7a is completely cooled by the cooling blades 18, and then stacked on the bag body 7 on the previously manufactured bag body receiving device 8. The presser blade 23 is
As the cooling blade 18 rotates continuously or intermittently, when the cooling blade 18 descends, it comes into contact with the front cooling blade 18 due to gravity, and in the downward direction, the two cooling blades 1
8, and when rising, the rear cooling blade 1
8 and is cooled, and waits for the lowering of the sealed portion 7a of the next bag 7, which has been sealed and cut by the fusion-cutting device consisting of the fixed pedestal 3 and the fusion-cutting head 4. . Further, the moving rod 28 returns to its original position after the cam 26 rotates the follower 25, and when the bag body 7 to be manufactured next descends between the cooling blades 18, it rises again. The cam 26 rotates the follower 25 of the next presser blade 23.

Note that the cam 26 is not provided with the moving rod 28;
6 is fixedly attached to the base so as to be rotatable around the rotating shaft 17, and due to the shape of the cam 26, the cam 26 engages with the follower 25 as the rotating shaft 17 rotates. It may be activated.

Effects of the Invention As described above, according to the device for preventing adhesion of a seal part in a bag making machine of the present invention, a fusing-cutting device, a transfer device for supplying bag material to the fusing-cutting device, and a cutting device are provided. a rotating shaft having a hollow portion provided with a plurality of hollow cooling blades projecting radially between the fusing-cutting device and the receiving device; By arranging a presser blade between the cooling blades and providing a rotating device that brings the presser blade into contact with the front cooling blade from the rear cooling blade, the sealing portion of the bag is lowered. Activate the rotating device to bring the presser blade cooled by the rear cooling blade into contact with the front cooling blade, and securely seal the bag one by one from both sides before the bag is stacked on the receiver. It is possible to perform stable cooling by maintaining the temperature at a certain temperature, and the seal parts do not adhere to each other.

In addition, since the water pipe is connected to the rotating shaft, the seal part is directly connected to the cooling blades cooled by water flow, compared to the conventional method where the seal part of the bag body is cooled by separating it between the cooling blades. Heat is removed well by the contact, and the sealing part is quickly cooled, improving bag-making efficiency.

[Brief explanation of the drawing]

Figure 1 is a schematic side sectional view of a conventional bag making machine;
The figure is a schematic side sectional view of a bag making machine equipped with a seal part adhesion prevention device according to an embodiment of the present invention, FIG. 3 is an enlarged sectional view of the same essential parts, and FIG. -A sectional view and FIG. 5 are sectional views taken along line BB in FIG. 1...Bag material, 2...Transfer roll, 3...Fixed pedestal, 4...Fusion-cutting head, 5...Electric heating element, 6
... Fusing knife, 7 ... Bag body, 7a ... Seal part, 8
... Bag receiver, 9 ... Piercing needle, 10 ... Holder, 11 ... Pressing tool, 12 ... Air injection pipe, 13
... Frame wheel, 14 ... Frame rod, 15 ... Seal part adhesion prevention device, 16 ... Hollow part, 17 ... Rotating shaft, 1
8... Cooling vane, 19... Inside, 20a, 20b
... Water pipe, 21 ... Gear, 22 ... Bearing, 23
... Presser blade, 24 ... Rotating shaft, 25 ... Follower, 26 ... Cam, 27 ... Bearing, 28 ...
...Movement stick.

Claims (1)

[Scope of utility model registration request] A bag making machine including a fusing-cutting device, a transfer device for supplying bag material to the fusing-cutting device, and a receiving device for holding the cut bag body, wherein the fusing-cutting device and the receiving device are provided. A rotating shaft having a hollow portion with a plurality of hollow cooling blades protruding radially between the tool and the cooling blade is arranged, a presser blade is arranged between the cooling blades, and the presser blade is connected to the rear cooling blade. 1. An apparatus for preventing adhesion of a seal part in a bag making machine, characterized in that a rotating device is provided which contacts a cooling blade in front of the cooling blade, and a water pipe is connected to the rotating shaft.