JPS6245868Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tube splicing machine for vehicle tires.

A splicing machine that forms a tire tube by simply cutting both ends of an unvulcanized tube and butting the cut ends together has already been disclosed in JP-A-52-85269. There is.

Here, the splicing machine shown in the above publication is
A tube end tightening arm that can be raised and lowered is arranged above a fixed support table and a movable support table that can freely approach and move away from the support table, and each arm and its corresponding support table After clamping both ends of the sulfur tube, the end protruding inward from the clamped part,
The tube is cut by moving a reciprocating knife between the support tables, and then, by moving the movable support table, the cut ends of the tube are butted against each other and spliced.

By the way, in the above-mentioned splicing machine, in order to pull out the looped tube after the splicing work is completed, the pair of tube end tightening arms are required to be cantilevered, and the tube When cutting the end, if the end of the tube moves due to the cutting resistance against the knife, it will not be possible to obtain an accurate cut, so a uniform tightening force is required over the entire width of the tube.

Generally, when a uniformly distributed load is applied to a cantilever beam of the same length and the same cross-sectional area and a beam supported at both ends, the amount of deflection of the cantilever beam is 9.6% compared to the amount of deflection of the beam supported at both ends. In order to make the amount of deflection the same, if the cross-sectional shape of the beam is square, the length of one side of the cantilever beam must be 1.76 times larger than the length of one side of the beam supported at both ends. There is a need to.

In conventional splicing machines, a cantilevered tube end tightening arm is moved up and down by a hydraulic cylinder connected to its supporting end, and the tube end tightening force generated by the hydraulic cylinder is applied to the arm. Since the arm is kept uniform all the way to the tip, it has the disadvantage of requiring a rigid arm with a large cross-sectional area. In addition, since a large arm is used, there is a restriction on the circumference of the tubes to be joined, making it impossible to join tubes with small circumferences. Since the cross-sectional area becomes large, the number of tubes that can be spliced is usually one, which also has the disadvantage of low productivity.

Therefore, this invention solves the above-mentioned conventional drawbacks, and by adopting a tube end tightening arm with a small cross-sectional area, it is possible to join tubes with a small circumference, and it is possible to improve productivity. The purpose of the present invention is to provide a tube splicing machine with the following features.

In this invention, when a cantilever arm for tightening the tube end is lowered and the end of the tube is tightened with a table placed below, the free end of the cantilever arm is pressurized by a pressurizing device. It is.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 3, a pair of support stands 2 and 3 are provided on both sides of the upper surface of the pedestal 1. As shown in FIGS. Two guide shafts 4 are installed horizontally above the left support base 3, and a cylinder 6 provided on the lower surface of the movable base 5 is fitted to the outside of each guide shaft 4 to support the movable base 5 on the right side. It is supported so that it can move toward and away from the platform 2.

The piston rod 8 of the cylinder 7 placed on the support stand 3 is connected to the movable stand 5, while the cylinder 7
is supported by a support piece 9 that stands up from the left support stand 3, and operates the cylinder 7 to move the piston rod 8.
When moved forward, the movable base 5 moves toward the right support base 2, and the movable table 11 provided on the front surface of the movable base 5 on the traveling side comes into contact with the fixed table 10 provided on the right support base 2. ing.

Fixed table 10 and this fixed table 10
Above the movable table 11, which can freely approach and move away from the tube, there is an arm 1 for tightening the tube end.
2, 12' are provided, each of these arms 12,
12' is a guide shaft 1 that stands up from the right support base 2.
3 and a guide shaft 13' standing up from the movable table 5 so as to be movable up and down. In addition, a right support stand 2 is provided at the support side end of each arm 12, 12'.
The piston rods 15 of the arm lifting cylinders 14 supported on the back side of the movable table 5 are connected to each other, and when each cylinder 14 is actuated to move the piston rods 15 backward, each arm 12, 12' is lowered and the lower part of the arm 12, 12' is lowered. Overlapping on the tables 10, 11, the above-mentioned tables 10, 11 and the arms 12, 1
The inner sides of 2' form the same surface.

Therefore, by supporting the ends of the tube T on the upper surfaces of the tables 10, 11 and lowering the arms 12, 12', the ends of the tube T are tightened by the tables 10, 11 and the arms 12, 12'. be able to.

In addition, tables 10, 11 and arms 12, 1
It is preferable to provide an elastic auxiliary band 16 for seaming forming inside the 2'.

Each arm 12, 12' may be moved up and down independently, but it is also possible to move the arms 12, 12' up and down simultaneously by inserting the interlocking shaft 17 provided in one arm 12 into the horizontal hole 18 formed in the other arm 12'. You can also do this.

the arm 12 for tightening the end of the tube T;
The free end of 12' is adapted to be pressed down by a pressure device 20.

As the pressurizing device 20, any mechanism can be adopted, but here, the pressurizing device 20 shown in FIGS.
As shown in the figure and FIG. 6, a pressure cylinder 22 is attached to the swinging side end of the U-shaped arm 21 supported swingably, and the pressure cylinder 22 is actuated to control the arms 12, 12'. The free end is pushed down.

That is, an arm support plate 23 is attached to the front side of the fixed table 10 and the movable table 11, and one end of the U-shaped arm 21 is supported on this arm support plate 23 via a pin 24, and the swing side of the arm 21 is A pressurizing cylinder 22 is attached to the end.
Further, a bracket 25 is attached to the arm support plate 23, and the piston rod 27 of the arm swinging cylinder 26 supported by this bracket 25 is connected to the support side end of the U-shaped arm 21.
When the piston rod 27 is moved forward, the U-shaped arm 21 swings and the pressure cylinder 22 at the end of the arm 1 is lowered to the tightening position.
2, 12' above the free ends.

The center portion of the tube T, which is tightened by the tables 10, 11 and the arms 12, 12', is supported by a saddle 30 placed above the arms 12, 12'. A guide shaft 31 is attached to the rear end of the saddle 30, as shown in FIG. be.

A saddle elevating cylinder 33 with an intermediate stop locking mechanism is supported by the guide tube 32, and a piston rod 34 of this cylinder 33 is connected to the rear end of the saddle 30, so that the height of the saddle 30 can be adjusted as desired. It's like this.

The end of the tube T clamped by the cantilever arms 12, 12' is cut linearly by the movement of the knife 41 of the cutting device 40 disposed between the fixed table 10 and the movable table 11.

This cutting device 40 can adopt, for example, the structure disclosed in the above-mentioned publication, but here, in order to shorten the cycle time, a knife for cutting the tube end is inserted about 1 mm in front of the auxiliary band 16. After the knife 41 is moved forward in parallel along the auxiliary band 16, it is lowered to a position where the knife 41 does not obstruct the movement of the movable table 11, and then moved backward parallel to the auxiliary band 16 below the auxiliary band 16. The cutting device 40 is configured such that the cutting device 40
is adopted.

That is, as shown in FIG.
Two guide shafts 42 are installed vertically inside the box body 43, and a sleeve 44 attached to the side surface of the box body 43 is fitted onto the guide shafts 42 to support the box body 43 in a vertically movable manner. A piston rod 46 of a lifting cylinder 45 is connected to this box body 43 to move the box body 43 up and down. Further, inside the box body 43, a double rod type cylinder 47 is arranged, and both ends of the rod 48 are fixed to the end plates of the box body 43, and a knife is supported on a cylinder tube 49 that is movable along the rod 48. Attach the stand 50, support the knife 41 on this knife support stand 50, and attach the cylinder tube 49 to the rod 4.
8, the knife 41 moves in parallel at a position close to the auxiliary band 16.
The mounting position of 1 is regulated.

The tube splicing machine shown in the embodiment has the above-mentioned structure, and its operation will be explained next.

Now, the end of the tube T supported by the saddle 30 is folded inward and supported by the fixed table 10 and the movable table 11, and the arm lifting cylinder 14 is moved with the tip of the tube slightly protruding from the inside of the auxiliary band 16. Activate the piston rod 1
When the tube T is moved backward, the cantilever arms 12, 12' are lowered, and both ends of the tube T are held by the arms 12, 12'.
12' and the corresponding tables 10, 11. Therefore, when the arm swinging cylinder 26 of the pressurizing device 20 is operated and the arm 21 is swung by the forward movement of the piston rod 27, the pressurizing cylinder 26 attached to the swinging end of the arm 21 is actuated.
2 faces above the free ends of the cantilever arms 12, 12', and by operating its pressurizing cylinder 22, the free ends of the cantilever arms 12, 12' are pressurized downward, and the tightening arms 12, 12 Although it is cantilevered, it has the same effect as supporting both ends, and tightens the tube ends uniformly across the entire width.

After tightening the tube end, the two rod-shaped cylinders 47 of the cutting device 40 are actuated to move the knife 41 parallel to the auxiliary band 16, so that the tube T
The end is cut straight. When the knife 41 stops at the forward position, the main body lifting cylinder 45 operates to lower the box main body 43, and the knife 41
When the table moving cylinder 7 descends to a position where it does not obstruct the movement of the movable table 11 and stops, the table moving cylinder 7
As a result of the operation, the movable table 11 moves toward the fixed table 10, and the cut ends of the tubes T are butted against each other. At about the same time, both rod-shaped cylinders 47 are actuated to move the cylinder tube 49, so that the knife 41 moves backward below the auxiliary band 16, while the cut ends of the tubes are held in a butt position.

After a predetermined period of time has elapsed since the cuts were brought together, the pressure cylinder 22 of the pressure device 20 is activated to release the pressure on the cantilever arms 12, 12', and the arm swing cylinder 26 is activated to move the U-shaped arm 21. The arm 21 is held in a state where the entire arm 21 is located below the upper surfaces of the tables 10 and 11. In addition, the pair of cantilever arms 12, 12' rises due to the operation of the arm lifting cylinder 14 to release the tube end tightening, and then the movable table 11 is moved from the fixed table to the fixed table by the operation of the table moving cylinder 7. Separate from 10.

By completing the above-described series of operations, the tube T of the wheel is supported by the saddle 30, and the tube T is manually pulled out toward the user.

In the case of the embodiment, two tube end support parts are provided on the tables 10 and 11, and the ends of the tube T supported by these support parts are simultaneously tightened by arms 12 and 12' arranged above them. Although a two-tube splicing machine is shown, the number of tubes spliced is arbitrary.

As described above, in this invention, the free end of the cantilever arm that clamps the end of the tube is pressurized by the action of the pressure device, so even though the clamping arm is cantilevered, it is supported at both ends. It is possible to obtain the same tightening effect as when tightening the tube with an arm. Additionally, by adding a pressurizing device to the free end of the cantilever arm, a tube end tightening arm with a small cross-sectional area can be used, making it possible to join tubes with short circumferences that were previously impossible. It can be made possible. Furthermore, since the ends of multiple tubes can be pressurized uniformly across the entire width in the width direction with a single tightening arm, multiple tubes can be spliced at the same time, which is also effective in improving productivity. can.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the tube splicing machine according to the invention, Fig. 2 is a right side view of the same, Fig. 3 is a plan view of the same, and Fig. 4 shows the tube tightening part. An enlarged sectional view, FIG. 5 is a front view showing an embodiment of the pressure device as above, FIG. 6 is a partially cutaway side view of the same as above, and FIG. 7 is a part showing an embodiment of the cutting device as above. It is a notch side view. 10... Fixed table, 11... Movable table, 12, 12'... Cantilever arm, 20... Pressure device, 21... U-shaped arm, 22... Pressure cylinder, 26... Arm swing cylinder .

Claims (1)

[Claims for Utility Model Registration] 1. A cantilever arm for tightening the tube end can be raised and lowered above a fixed table that receives the end of the unvulcanized tube and a movable table that can move toward and away from this table. established in
In this tire tube splicing machine, the end of the tube is cut by each arm and its corresponding table, and the cut end of the tube is butted and spliced by moving the movable table, in which the cantilever arm is lowered. in the lower stop position where the tube ends are tightened.
A tire tube splicing machine equipped with a pressurizing device that presses down the free end of this cantilever arm. 2. The pressurizing device is provided with a U-shaped arm that is swingable in relation to each table, and the swinging side end of this arm is located at a position corresponding to the upper free end of the cantilever arm, and the said end is located at a position corresponding to the upper free end of the cantilever arm. A registered utility model in which a cylinder is provided to swing the arm between the position below the tube support surface of the arm, and a pressure cylinder for pushing down the free end of the cantilever arm is attached to the swinging end of the arm. A tire tube splicing machine according to claim 1.