JPS62256341A - Manufacture of bulb for circular fluorescent lamp - 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 (A) Industrial Application Field The present invention relates to a method for molding a bulb for an annular fluorescent light, and more specifically, it relates to a method for molding a bulb of an annular fluorescent light, and more specifically, it involves shaping a straight bulb into an annular shape while continuously moving it in a horizontal state. Regarding the method.

(B) Prior art 〇→Shinka Iha Restrictions 1r 7 14 I Korea-Chinato One way to form a valve into an annular shape is to hold one end of the valve on the outer periphery of a turret that rotates intermittently. chucks are provided at intervals in the circumferential direction, and the chucks hold the upper end of the valve so that the valve is vertical, and a heating device is provided around the outer periphery of the turret to heat the valve when the turret is intermittently stopped. The heating device heats the bulb while rotating intermittently, and when the bulb comes out of the heating device and stops intermittently at the molding position, a winding drum holding one end of the bulb is raised while rotating, and the heated bulb is shaped into an annular shape. I try to mold it into However, in such a conventional method, since the valve must be wound up when the turret is intermittently stopped, there is a problem in that the manufacturing speed is low and efficiency cannot be improved.

As a method to solve this problem, a method has been proposed in the past, as described in Japanese Patent Publication No. 52-18513, in which two valves are held at a time with a chuck and molded two at a time. However, since the turret is rotated intermittently to perform operations such as heating and molding the valves, there is a limit to speed-up.

Problems to be solved by the present invention The problem to be solved by the present invention is to support the valve in a horizontal position and heat it while continuously moving it, and then heat the valve in a horizontal position using a continuously rotating turret. The aim is to improve the molding speed of the valve by continuously transporting the valve and molding it into an annular shape using a winding drum attached to the turret.

B.) Means for Solving the Problems The present invention relates to a method for forming an annular fluorescent bulb in which a straight glass bulb is heated and then shaped into an annular shape, in which the bulb is supported in a horizontal position and heated. The valve is heated by passing it through the furnace while being continuously moved, and the heated valve is supported horizontally by a continuously rotating turret and is continuously transferred by a winding drum attached to the turret. It is configured to be rolled up and formed into a ring shape.

(e) Examples A method for molding an annular fluorescent bulb according to the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows an apparatus 1 for carrying out the method for forming an exhaust pipe according to the invention. In the figure, reference numeral 2 denotes a transfer device that transfers the valves in a horizontally lying state at predetermined intervals, 4 a heating device disposed above the transfer device, and 6 a molding machine.

As shown in the third factor, the transfer device 2 includes a pair of endless chains 23 and 24 guided by a pair of guide plates 21 and 22 and connected to each other by a plurality of connecting rods 25 arranged at predetermined intervals. It is constructed by arranging two double chain conveyors 2o in parallel. As shown in Fig. 1, each chain of this double chain conveyor is hooked on one driving sprocket (double type) 26 and one idle sprocket (double type) 27, and is rotated in a fixed direction by the action of these sprockets. It has become so.

Each connecting rod 25 has a pair of support blocks 28 and 29 attached thereto, as shown in FIG. is installed almost horizontally. For similar installation of another double chain conveyor (not shown), a pair of support rods 31 (only one shown) are installed parallel to each other between the tip of the rod 30 and the other double chain conveyor (not shown). The busy attachment is attached via a tool 32.

As shown in FIG. 3, a valve a is placed on the pair of support rods 31 in a horizontal position. Both ends of the valve are held by valve chucks 33 disposed near both ends of the support rod 31. This valve chuck 33 has a known structure in which the tube body is held between a pair of holding claws that can be opened and closed, and is attached to a link of a chain to which a rod 30 and a support rod 31 are attached. attached to a link (not shown) between. On the other hand (right or left in Figure 3) σ)ノZ
R+Go4-J--Power! , Nakano (Shibu Yut I Yua Nii)
It is installed with play as shown in Table L2 Eclipse Year 11 Foundation.

The heating furnace 4 is provided in the middle of the transfer device, and has a known structure including a furnace body disposed on both upper and lower sides of the tube transfer path and a plurality of burners attached to the furnace body. It is something.

As shown in FIG. 2, the molding machines 6 are arranged facing each other and separated from each other (at a distance larger than the length of the valve), and are rotatable with the same axis line by supports 61 and 62, respectively. It is equipped with a pair of turrets 63 and 64 supported by.

These turrets 63 and 64 are synchronously rotated in the same direction at the same speed by a drive mechanism of a known structure (not shown).

On the periphery of one turret 630, a plurality of winding drums 65 having a structure similar to the winding drum of a conventional valve molding machine are provided at intervals in the circumferential direction. Each winding drum is provided with a chuck (not shown) for gripping one end of the valve, as in the prior art. Rondos 66 are attached to the other turret 64 at respective positions corresponding to the positions of the winding drum of the turret 63 so as to be movable in a direction parallel to the axis of rotation. A chuck 67 for gripping the other end of the valve is attached to one end of each rod 66 on the turret side.

In the above configuration, the valves a are held horizontally by the transfer device 2 and are sequentially sent in the direction of the arrow X, and the heating device 4
It is heated to a predetermined temperature while passing through the inside. The heated valve α is placed on the winding drum 65 of the turret 63 of the molding machine 6.
(not shown) and the chuck 67 of the turret 64, and is held by these chucks and continuously sent in the direction of arrow Y by continuous rotation of the turret.

The method of transferring the chucks from the transfer device 2 to the molding machine 6 is as shown in FIG.

At the delivery position, a delivery plate 7 of a known structure is inserted under the valve to open the valve chuck 33 of the transfer device, and at the same time, the delivery plate 7 is moved to chuck the winding drum of the molding machine which is open and waiting. and insert the end into the other chuck 67.

Valve α is held in the chuck of the molding machine and moved to the turret 6.
3. When 64 begins to rotate, the winding drum begins to rotate at a peripheral speed faster than the speed of the chuck 67, and winding starts from one end of the valve (the right end in Figure 2), and the continuous rotation of the turret causes the winding drum to rotate at a peripheral speed faster than the speed of the chuck 67. Molding is performed while moving. When winding and molding begins, the other end of the valve moves to one end while being held by a chuck as the molding progresses.

The valve that has been completely rolled and formed is removed from the chuck of the forming machine at the discharge position and sent to the subsequent process.

Note that, as in the prior art, N2 gas is fed from an exhaust pipe chuck 68 that moves in pair with the valve chuck 67 to apply pressure inside the valve to prevent the softening valve from collapsing during molding.

(F) Effect: A turret equipped with a large number of winding drums is continuously rotated, and the heated and softened bulb is continuously transferred and rolled to form, making it possible to form at a higher speed than conventional intermittent drive and fixed position forming. .

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of an apparatus for carrying out the method of molding a fluorescent bulb according to the present invention, FIG. 2 is an elevational view of the molding machine, and FIG. 3 is a diagram showing a bulb transfer device. 1: Molding device 2: Transfer device 4: Heating device 6: Molding machine 63.64: Turret 65: Winding drum Patent applicant: CKD Co., Ltd. (5 others)

Claims (1)

[Claims] In a method for forming an annular fluorescent light bulb in which a straight glass bulb is heated and then shaped into an annular shape, the bulb is supported horizontally and continuously moved through a heating furnace. The heated valve is supported in a horizontal state by a continuously rotating turret, and is continuously transported while being wound into an annular shape by a winding drum attached to the turret. Method of molding bulbs for fluorescent lights.