JPS5866698A - Standard-size cutter for stringy product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixed-length cutting device for string-like products, in which two chatter λ-wires that reciprocate along the product travel line alternately hold the end of the string-like product in their mouths and cut the string-like product to a fixed length from the cutting point. The main feature is that the chuck, which pulls out the length, cuts under constant tension, and releases and returns, is designed to avoid colliding with the chuck that moves forward while holding the product in its mouth.

Generally, string-like products are bendable and easily expand and contract, so cutting the rope to a certain size is surprisingly troublesome. For example, when extrusion molding a plastic string-like caskerat (sealing material) and cutting it one after another into a certain length, conventionally, after cutting it mechanically one after another, the end was placed on a gauge and finished by hand. are doing.

The mechanical cutting method can be divided into two types.The first method is to stretch the string-like product by adding a fast take-up conveyor to the end of a V-shaped delivery conveyor. When the upper fixed position is reached, both conveyors are stopped and
disconnect.

The second method is to constantly measure the length from the tip of Jiyuhiko while running the product on a conveyor or sliding plate, and place it on a flying cutter to cut it.The cutter device moves against the moving product. Then return to the starting point and repeat the disconnection.

This method allows the product to be stretched into a string-like product and can be cut to a constant length without worrying about bending.

However, in the case of plastic string-like products that are highly flexible and stretchable, the above-mentioned mechanical cutting method is difficult to avoid due to variations in length and the generation of sloping cut surfaces due to cutting of curved products.

The present invention provides a device capable of cutting a string-like product that is easily stretched and bent to a fixed length using a mechanical cutting depth.Next, the configuration and embodiments thereof will be explained with reference to the drawings.

FIG. 1.2 is a detailed explanatory diagram of the present invention, the main parts of which are a feed guide path for the string-like product M, a dancer roller mechanism λ for tension adjustment, a product cutting device 3, and the tip of the guide path. A pair of product chucks that travel back and forth in opposite directions along the running route.
, t', when the respective chucks move forward and reach a distance of 15r'lJ in front of the cutting device 3, the respective fixed length indicating devices t1 and chucks s, , 1'', which stop the chucks, move forward and stop the chucks. 5B-66G! 18 (2) Each starting point indicating device 7, etc. that stops the machine when it returns to its normal position at the rear of 3.

The feed guide path / for the product M has many guides or conveyor rollers g and a feeding device, and a dancer roller λ is inserted between the rollers g to run the product M in a V-shape or a U-shape. In this example, an adjustable weight 2a is attached to a known dancer roller so that the tension of the product M can be adjusted by gravity, and a chuck is used by known means to keep the vertical movement of the dancer roller λ within a small range. ! Alternatively, the 5' extractor motor 13 and the chuck return motor 10 are controlled to control the chuck extractor speed and the speed of the driving conveyor roller g that is synchronized therewith.

Product M is fed out from the feeding device and chucked! , j
When the product M is always held in its mouth by one of the rollers υ and the weight of its own sagging portion, the dancer roller λ, and its weight λα, a tensile stress or clamp tension is generated. The chuck or j' is υ by the fixed length indicating device B.
When stopped, the product M is held in a straight line by this tension, so that a strong cut surface with the correct length and inclination can be obtained.

In this case, the cutting device 3 moves the rotary blade up and down. Of course, the rotary blade may be of a horizontally movable type. Since the string-like product M of this embodiment has a reinforcing metal wire in its core, a rotating blade is preferable to cut the stiffness, but other cutting blades may of course be used.

A pair of chucks j alternately hold one ull of the product M after the cutting position at the starting point, move forward by a fixed length, stop, and pull out the multi-cut product M to a set length.

In this case, j' is the reciprocating compare chain on the sliding platform (tα), and the rear end of one stroke is the starting point slightly behind the cutting blade 3, and the front end of the stroke is the fixed length point. The chucks, t and t', are placed on a sliding platform and each has a product clamping mechanism Sa protruding inward (see Fig. 6).The chucks clamp the product M by a fluid pressure cylinder sb, and when opened, Since it opens wide, the chucks j and t' on both sides will be strained if you make a mistake.

A- The method of clamping the product with the force chucks S and J' is arbitrary, and if it is difficult to easily misplace it as shown in Figure 6 due to its structure, the clamping mechanism should be moved to the retracted position during the return stroke of the chuck. You can also avoid the chuck moving forward. The guide mechanism of the chuck is also powerful with a sliding platform, for example, an H-shaped steel is supported horizontally, and both vertically standing flanges are placed on the left and right chucks.

It can be designed as appropriate, such as by running a chuck stand with a wheel as the rail of j' and allowing the chuck to come out downward from the chuck stand, but the easiest way to take out the cut product M is to drop it downward. It is a good idea to leave a gap for the removal.

Chucks on both sides! Although the reciprocating drive mechanism of the reciprocating conveyor rollers l/La, 4t
By α. The drive direction of both chains lla and lIα is changed by motors 10 on both sides. /, 3 depends on the on/off of the electromagnetic clutch /l in the transmission section.

Now, the electromagnetic clutch of the electric lock mechanism on the motor 10 side.

By turning on // and turning off electromagnetic brakes /2 and /2, as shown in Figure 1.2, the front chuck j reaches the frontmost part on the left side of -7- in the figure, and the rear chuck j' After returning to the starting point on the right side of the figure, each is moved according to the commands from the standard length indicating position B, the product M draw-out indicating device t', and the starting point indicating device 7 (both of which are limit switches shown only in FIG. 1). Assume that the latch // is off and the brake 72 is on. At that time, the chuck j still holds the product M in its mouth, and the return chuck j' grasps the product M at the same time as it stops. Then, use the cutting tool W3 to cut a little in front of the gripping position, move it forward to the unloading position, and then chuck it! Fully open and cut product M is dropped down.

So this time, the motor/electromagnetic clutch of the 3rd side electric mechanism//
, // are turned on, the chuck j' is moved forward while holding the cut end of the product M in its mouth, and the opened chuck j is returned.

In this case as well, when the length indicating device 2 reaches the starting point indicating device 7, they each stop 2, and this time the chuck j holds the rear side of the cutting position in its mouth and acts as a cutting clamp, and this process is automatically repeated. .

Although the explanation has been given above using examples, the emission η aperture U5
B-GGG! J8(3) may be varied in various ways depending on the well-known technology of the designer implementing the product without changing its gist; for example, the structure of the product chuck and its travel guide drive mechanism may be changed using the well-known technology of the machine designer. There are various changes such as changing the drive means to a rack/binion or fluid pressure drive instead of a chain, replacing the standard length and starting point indicating device with a distance measuring device instead of using a detection switch, or For example, by mechanically setting a constant stroke and issuing a command at the end of the stroke,
It's easy to think of.

This invention eliminates the conventional concept of laying the product on a conveyor and cutting it at a fixed distance from the tip of the product. Instead, the tip of the product is stopped at a specified length position by a chuck, and at that time, The rear side of the product is held by a dancer roller to maintain the required tension on the product, and in this state, another chuck is used to hold the product at the rear end of the cutting position and cut the product. Therefore, the product is cut to a fixed length under constant tension, and the chuck on the above side plays the role of a cutting clamp, and then immediately holds the cut end in its mouth and advances the cutter to a fixed length. This also contributes to simplification and efficiency, and the structure that prevents two chucks holding the same product from being misplaced also contributes to simplification. Due to this problem, manual finishing cutting is required.
The effect is strong.

[Brief explanation of the drawing]

FIG. 1 is a front explanatory view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged explanatory view of a product chuck. l...feeding guide path, co...danzer roller, 3...
・Cutting device, j, 5'...product chuck, t...
- Fixed length indicating device, 7... Starting point indicating device. Patent applicant Mitsuha Seisakusho Co., Ltd. Agent Patent attorney Fuku 1) Attorney Haku
Person Patent Attorney Fuku 1) Takeru Dori

Claims (1)

[Claims] A feeding guide path for string-shaped products, a dancer roller mechanism for tension adjustment, a product cutting device, a pair of product chucks that reciprocate in opposite directions along the travel route at the tip of the guide path, and each chuck moves forward. , respective fixed length indicating devices that stop the cutting device when a required distance in front of the cutting device is reached, and respective fixed length indicating devices that stop the force when each of the chucks returns to a fixed position behind the cutting device. Equipped with a starting point indicating device,
A fixed-length cutting device for string-like products, characterized in that the opened chuck is not obstructed by the chuck that holds the product in its mouth, and can be easily misplaced.