JP2005281108A - Chuck and method for manufacturing lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chuck capable of securely sandwiching, for example, a crooked lamp having two rod-like parts. <P>SOLUTION: A chuck mechanism is provided with jaws 330 and 340 moving in the direction sandwiching the U-shaped crooked lamp, and plate members 310 and 320 attached to the jaws 330 and 340. The crooked lamp has two rod-like parts locating in a plane where the plane, in which the two rod-like parts are locating, is arranged in a state perpendicular to a direction in which a pair of jaws 330 and 340 are coming close, and one plate member 320 is pivoted rotatably to the jaw 340 by a pin 345 having an axial center parallel to a direction in which the rod-like parts 32 and 33 are extending. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chuck for clamping an object disposed between a pair of members by the pair of members, and a method of manufacturing a lamp using the chuck.

In recent years, a liquid crystal display screen has been increased in size, and a direct-type backlight unit in which a plurality of lamps are arranged on the back surface of the screen has been adopted. In such a direct-type backlight unit, for example, a bent lamp that is bent into a “U” shape is used in order to reduce the number of lamps to be used.
By making the lamp shape “U”, brightness equivalent to that of two conventional straight tube lamps can be obtained, while the number of electrodes used in the lamp is halved compared to the conventional one, and the overall cost of the backlight unit is low. Can be realized.

In the conventional “U” -shaped bent lamp, first, a phosphor is applied to the inner peripheral surface of a straight tubular glass tube, and electrodes are sealed at both ends of the coated glass tube to form a straight tubular lamp. After manufacturing, this straight tube lamp is set in a bending device and bent into a “U” shape.
The bending device fixes substantially the center of the straight tubular lamp, and bends both ends of the lamp by 90 ° in a state where the outer portion is locally heated from the fixing position in the lamp. After bending, the two rod-shaped parts constituting the “U” shape are held by the chuck, and the bending lamp is taken out from the bending device. As a chuck for sandwiching such a “U” -shaped bent lamp (bent glass), a chuck as described in Patent Document 1 has been proposed.

FIG. 12 is a plan view of a chuck that has been conventionally used to hold the bending lamp.
As shown in FIG. 12, the chuck 900 includes a pair of plate members 910 and 920 that sandwich two rod-shaped portions extending in a direction perpendicular to the paper surface when both come close to the G direction. Has a configuration.
Japanese Utility Model Publication No.59-153330

  However, the chuck 900 configured as described above has no problem when the outer diameters of the rod-shaped portions of the bending lamp to be sandwiched are equal, but in the actual manufacturing process, a pair of rod-shaped portions 951 and 952 (imaginary lines in FIG. 12). When there is a difference in the outer diameter, there is a problem that a gap S is generated between the rod-like portion (952) having a small outer diameter and the plate member (920), and the bent lamp cannot be clamped stably.

This is because, if the bending lamp cannot be clamped in a stable state, for example, when the bending lamp is taken out from the bending apparatus, the bending lamp contacts the bending apparatus and is damaged. In particular, if the finished bent lamp is taken out when it is damaged, the loss is naturally large.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a chuck and a lamp that can securely hold an object having two rod-shaped parts, for example. And

  To achieve the above object, a chuck according to the present invention includes a first member attached to a first base, and a second member attached to a second base in a state of facing the first member. An object disposed between the first member and the second member by relatively bringing the first base and the second base close to each other. A chuck for clamping, wherein at least one of the first and second members is tiltable with respect to a plane perpendicular to a proximity direction in which the first base and the second base are close to each other. It is characterized by being attached.

In addition, the object has two rod-like portions located in substantially one plane, and the at least one member is tiltable so as to contact the two rod-like portions of the object. It is said that.
As used herein, “two rod-shaped portions positioned in substantially one plane” refers to a case where the axial centers of the two rod-shaped portions are in substantially the same plane. There are lamps, lamps that are bent into a “U” shape, a “V” shape, a “W” shape, and the like. However, the shape is not particularly limited to this shape, and is not limited to a lamp.

  The at least one member is rotatably supported by a shaft attached to a base corresponding to the member, and the shaft moves the object in the proximity direction and the at least one member. When viewed from the member side, the shaft extension line is attached so as to pass between the portions of the at least one member that are in contact with the two rod-shaped portions of the object.

  Furthermore, a regulating member that regulates movement of the object in the direction in which the two rod-shaped portions are arranged on a surface of the first member that is in contact with the two rod-shaped portions of the object. It is characterized by being provided. In addition, the object is a “U” -shaped glass tube, and the first and second members are in contact with a pair of rod-shaped portions constituting the “U” -shape. .

  Moreover, the manufacturing method of the lamp | ramp which concerns on this invention includes the taking-out process of a lamp | ramp, and the said lamp | ramp is equipped with two straight tube | pipe lamps located in one plane, or two rod-shaped parts located in one plane. In the step, the lamp is taken out using the chuck having the above-described configuration.

In the chuck according to the present invention, when the object has, for example, two rod-shaped portions and the outer diameters of the two rod-shaped portions are different, one member has two rod-shaped portions. Since it inclines so that it may touch, it can pinch | interpose a target object reliably.
In the lamp manufacturing method according to the present invention, since the above-described chuck is used, for example, even when a “U” -shaped lamp in which the outer diameters of the two rod-shaped portions are different is clamped, The lamp can be clamped, and the ramp can be prevented from being tilted as occurs when a conventional chuck is used. Therefore, for example, when the “U” -shaped lamp is taken out from the bending device, it is possible to prevent damage due to the inclination of the lamp that has occurred when the lamp is held by a conventional chuck.

Hereinafter, a backlight unit using the lamp according to the present invention will be described, and then a manufacturing method of the lamp and a chuck according to the present invention will be described.
1. FIG. 1 is a schematic perspective view of a backlight unit, in which a part of the front panel is cut away so that the inside can be seen.

As shown in FIG. 1, the backlight unit 1 includes “U” -shaped lamps arranged in a plurality of rows at intervals in a predetermined direction (here, up and down direction) (this lamp is referred to as a “bending lamp”). 30, 40, 50, 60, 70, a housing 10 that houses the bent lamps 30, 40, 50, 60, 70, and a front panel 20 that covers the front surface (opening) of the housing 10.
The bottom plate 11 of the housing 10 is a reflecting plate that reflects light emitted from the bent lamps 30, 40, 50, 60, and 70 to the front side, and for example, polyethylene terephthalate (PET) is used. It has been. The side plate 12 constituting the housing 10 is also made of the same resin as the bottom plate 11.

The front panel 20 is for diffusing the light from each of the bending lamps 30, 40, 50, 60, and 70 and extracting it as parallel light (normal direction of the front panel 20). 22 and a lens sheet 23. The diffusion plate 21 is made of an acrylic material.
2. FIG. 2 is a diagram showing a bent lamp, in which the end side of the bent lamp is cut away so that the configuration of the internal electrodes can be seen.

The bending lamp 30 has the same configuration as the other bending lamps 40, 50, 60 and 70, and will be described below using this bending lamp 30.
The bent lamp 30 has electrodes 82 and 84 sealed to the end portions 31a and 31b of the glass tube 31, and has a “U” shape as described above, and a pair of rod-shaped portions 32 and 33 and And a connecting portion 34 that connects one ends of the pair of rod-like portions 32 and 33.

The glass tube 31 has a circular cross-sectional shape, and a phosphor 80 is applied to the inner peripheral surface thereof. For example, a three-wavelength rare earth phosphor is used for the phosphor 80.
The discharge space formed inside the glass tube 31 sealed at both ends is filled with, for example, a predetermined amount of mercury, rare gas (eg, argon, neon), or the like. Note that the rare gas is sealed in a reduced pressure state.

The electrodes 82 and 84 include bottomed cylindrical electrode bodies 82a and 84a and electrode bars 82b and 84b attached to the bottoms of the electrode bodies 82a and 84a. The electrode bars 82b and 84b are bead glass 82c, It is sealed to end portions 31a and 31b of the glass tube 31 through 84c.
3. Manufacturing method of bending lamp The manufacturing method of the bending lamp 30 is demonstrated. The bent lamps 40, 50, 60, and 70 can be obtained by the same manufacturing method.

FIG. 3 is a schematic view for explaining a method of manufacturing a bent lamp.
The bending lamp 30 includes a straight tube lamp manufacturing process for manufacturing a straight tube lamp (hereinafter referred to as “straight tube lamp”) 30a, and the straight tube lamp 30a is bent into a [U] shape with a bending device. 30 is obtained through a bending lamp forming step (FIG. 3A) formed on the substrate 30 and an extraction step in which the bending lamp 30 is taken out of the bending device and hooked onto the horizontal rod 110 arranged at a predetermined position, for example. .

In addition, since the bending lamp 30 is manufactured using the straight tube lamp 30a, the reference numeral for the straight tube lamp which is the previous stage of the bending lamp 30 is represented by adding “a” to the reference numeral used for the bending lamp. I will decide.
The dimensions of the bent lamp 30 described here are as follows: the outer diameter of the glass tube 31 is about 3 mm, the inner diameter is about 2 mm, the longitudinal dimension of the connecting portion 34 is about 37 mm, and the lengths of the rod-like portions 32 and 33 are about 340 mm. It is. In addition, the said dimension is an example of the bending lamp of this invention, and is not limited to this dimension.

Now, each step will be described below.
(1) Straight tube lamp manufacturing process As explained in the section of “Background Art”, the straight tube lamp 30a is coated with the phosphor 80 on the inner peripheral surface thereof using the straight tubular glass tube 31a. It is obtained by sealing the electrodes 82 and 84 at both ends of the glass tube 31a. In addition, the straight tube glass tube used for manufacturing the straight tube lamp 30a thus obtained is represented as “31a”.

(2) Bent ramp forming step FIG. 3A is a schematic view showing a bent ramp forming step.
Hereinafter, a bent lamp forming process for bending the straight tube lamp 30a will be briefly described with reference to FIG.
First, the straight tube lamp 30a is set in a bending device.

The bending device is not particularly illustrated, but a fixing chuck 103 that fixes the substantially center of the straight tube lamp 30a and a holding roller that holds a position closer to the end of the straight tube lamp 30a than a portion fixed by the fixing chuck 103. 101 and 102, and coil heaters 108 and 109 for heating the planned bending portion of the straight tube lamp 30a.
Here, the coil heater 109 and the holding roller 102 are attached to a first base (not shown), and the coil heater 108 and the holding roller 101 are attached to a second base (not shown). It has a mechanism for rotating the table around the rotation centers G and G ′.

Each of the holding rollers 101 and 102 is formed by arranging two pairs of rollers along the longitudinal direction of the straight tube lamp 30a so as to sandwich the straight tube lamp 30a.
When the straight tube lamp 30a is set in the bending apparatus having the above configuration, one end (for example, the right end) side of the straight tube lamp 30a is held by one (left side) holding roller (102), and this one end (right end) is held. The straight tube lamp 30a is moved so as to push out toward the fixed chuck 103 side. As a result, one end (right end) of the straight tube lamp 30a passes through the two coil heaters 109 and 108 and is held by the other (right side) holding roller (101). Then, when one end (right end) of the straight tube lamp 30a reaches a predetermined position, the movement of the straight tube lamp 30a is stopped, and the center of the straight tube lamp 30a is fixed by the fixed chuck 103.

Next, the bent portion of the straight tube lamp 30a is heated to a substantially softening point by the coil heaters 108 and 109, and the first base and the second base are moved upward around the rotation centers G and G '. Rotate. As a result, as shown in FIG. 3A, the straight tube lamp 30a is bent into a “U” shape, and the bent lamp 30 is formed.
(3) Extraction Step In this step, the bending lamp 30 is taken out from the bending device and is attached to the horizontal bar 110 as shown in FIG. This step is performed using a take-out device described later. In other words, the rod-shaped portions 32 and 33 (end portions on the connection portion 34 side) of the bending lamp 30 are held by the chuck mechanism (corresponding to the chuck of the present invention) of the take-out device to lower the chuck mechanism, and the lowered position Then, the chuck mechanism is rotated 180 degrees so as to reverse the posture of the bending lamp 30 up and down. Finally, the chuck mechanism is lowered so that the bending lamp 30 is hooked on the horizontal bar 110, and the bending lamp 30 is moved near the horizontal bar 110. Release the pinch.

First, the take-out device provided with the above-described chuck will be described, and then the take-out process will be described.
3-1. Extracting Device FIG. 4 is a schematic perspective view of the extracting device.
As shown in the figure, the take-out device 200 includes a chuck mechanism 300 that holds the bending lamp 30, a rotation holding mechanism 400 that rotatably holds the chuck mechanism 300, and a rotation holding mechanism 400 in the vertical direction. And a movement holding mechanism 500 for holding the movement movably.

Here, in FIG. 3B, the bending ramp 30 is clamped by the chuck mechanism 300, and the chuck mechanism 300 is rotated by the rotation holding mechanism 400 to reverse the posture of the bending ramp 30 up and down. Then, the movement holding mechanism 500 lowers the chuck mechanism 300 to lower the bending ramp 30.
FIG. 5 is a schematic perspective view of the chuck mechanism. 6 is a view of the chuck mechanism as viewed from the X direction of FIG. 5, and FIG. 7 is a view of the chuck mechanism as viewed from the Y direction of FIG.

The chuck mechanism 300 uses, for example, an air chuck, and each of the pair of jaws 330 and 340 (corresponding to the first base and the second base of the present invention) connected to the air chuck is a plate member 310. 320 (corresponding to the first member and the second member of the present invention) are attached.
That is, the pair of jaws 330 and 340 are arranged to face each other, and are movable in directions far from each other. When moved in directions close to each other, they are arranged between the plate members 310 and 320 facing each other. It is designed to hold the target object.

  In this air chuck, the pair of jaws 330 and 340 and the direction in which each of the jaws 330 and 340 is moved away from each other (the direction C in FIGS. 5 and 7 is referred to as “perspective direction” or “clamping direction”. And a driving unit 360 that moves the pair of jaws 330 and 340 in the perspective direction along the guide member 350. The drive unit 360 includes an air cylinder that moves the pair of jaws 330 and 340 in the perspective direction using compressed air.

Here, the chuck mechanism 300 uses an air chuck that uses compressed air. However, for example, a magnet chuck may be used. That is, the structure for moving and driving the pair of jaws in the perspective direction is not particularly limited as long as it is a structure for moving them.
As shown in FIG. 6, the plate members 310 and 320 have portions 35 and 36 that are close to the connecting portion 34 of the rod-like portions 32 and 33 in the bending lamp 30 (this portion is referred to as “held portion”) at two locations simultaneously. For example, when viewed from a perspective method, a “U” shape is formed as shown in FIG.

The upper portions of the pair of straight portions constituting the “U” shape in each plate member 310, 320 are projected toward the other plate member 320, 310 side and are substantially simultaneously applied to the sandwiched portions 35, 36 of the bending lamp 30. Contact portions that contact each other are formed.
The contact portions of the plate member 310 are denoted by reference numerals “311 and 312”, and the surfaces of the contact portions 311 and 312 are referred to as contact surfaces 311a and 312a. The contact portions of the plate member 320 are denoted by reference numerals “321, 322”, and the surfaces of the contact portions 321, 322 are referred to as contact surfaces 321a, 322a.

  The abutting portions 311, 312, 321, 322 are projected in this way because the bent lamp 30 is formed by bending the straight tube lamp 30 a, so that the bent portion (this portion is When the sandwiched portions 35 and 36 of the bent lamp 30 are clamped, the contact surfaces 311a, 312a, 321a, and 322a are formed as shown in FIG. This is to avoid contact with the bent portions 37 and 38. That is, the plate members 310 and 320 include relief portions of the bent portions 37 and 38 below the contact portions 311, 312, 321, and 322 that contact the bent lamp 30.

  Of the pair of plate members 310 and 320, one plate member 320 is provided so as to be tiltable so that the orientation of the main surface thereof changes. Specifically, the plate member 320 is pivotally supported by a pin (corresponding to the shaft of the present invention) 345 provided on the jaw 340 so as to be rotatable about its axis. On the other hand, of the pair of plate members 310 and 320, the other plate member 310 is screwed to the jaw 330 with screws 331 and 332 (see FIG. 9).

  The pin 345 is arranged in a substantially parallel state with respect to the rod-like parts 32 and 33 of the bent lamp 30, and the arrangement position is substantially the center of the two contact parts 321 and 322 of the plate member 320, The plate member 320 is located on the outer side in the perspective direction with respect to the contact surfaces 321a and 322a. Thereby, when pinching the bending lamp 30, it is possible to prevent the pin 345 from coming into contact with the bending lamp 30.

The pin 345 may be arranged at a position other than the above. In other words, when the bent lamp 30 to be sandwiched is viewed from the side of the plate member 320 in the proximity direction, if the extension line of the pin is arranged so as to pass between the contact portions 321 and 322 of the plate member 320, a rod shape The plate member 320 can be inclined corresponding to the difference in thickness between the portions 32 and 33.
The dimension (the height is referred to as “height”) H in the direction in which the rod-like portions 32 and 33 of the bent lamp 30 extend in the contact portions 311, 312, 321 and 322 of the plate members 310 and 320 is the rod-like portion 32. , 33 is about 5 times the thickness (outer diameter) T (see FIG. 7). Specifically, the outer diameters of the rod-shaped parts 32 and 33 are about 3 mm, and the height H of the contact surface is about 15 mm. In addition, if this height H is about 3 times or more with respect to the thickness T of the rod-shaped parts 32 and 33, the bending lamp | ramp 30 can be clamped stably.

As shown in FIGS. 5 and 6, the guide member 350 includes grooves along the perspective direction, and the jaws 330 and 340 are screwed to the inner fitting body 355 fitted into the grooves with screws 333 and 343. ing.
As shown in FIG. 4, the rotation holding mechanism 400 includes a rotation drive device (motor) 420 that rotates the chuck mechanism 300, and the chuck mechanism 300 is interposed via, for example, an “L” -shaped L member 430. Are attached to a rotation shaft 421 of the rotation drive device 420. The L member 430 has a chuck mechanism 300 attached to one side 431 and a rotating shaft 421 attached to the other side 432. Thereby, the chuck mechanism 300 can be rotated in the B direction.

The rotation drive device 420 is attached to one side 411 of the L member 410, for example. The other side 412 of the L member 410 is attached to the movement holding mechanism 500.
As shown in FIG. 4, the movable holding mechanism 500 includes a guide member 510 that extends in the vertical direction, a movable element 530 that is arranged inside the guide member 510 and is movable in the vertical direction (A direction in the figure), A screw shaft 520 for screw-feeding the mover 530 and a drive unit (not shown) for rotating the screw shaft 520 are provided.

The guide member 510 has a quadrangular cross-sectional shape, and is provided with an opening 512 extending in the vertical direction on one side, and the movable element 530 is provided on one side 412 of the L member 410 of the rotation holding mechanism 400 through the opening 512. It is fixed to.
3-2. Extraction Process FIG. 8 is a schematic diagram illustrating the extraction process.

Hereinafter, the extraction process will be briefly described with reference to FIG.
First, the state where the bent lamp 30 formed by bending the straight tube lamp 30a shown in FIG. 3 is lowered and is held by the chuck mechanism 300 of the take-out device 200, and the chuck mechanism is further lowered to a predetermined position. Is (a) of FIG. Here, the predetermined position is a position at which the bending lamp 30 does not contact at least the bending device when the chuck mechanism holding the bending lamp 30 is rotated.

FIG. 9 is a view of the chuck mechanism as viewed from the Z direction in FIG.
As shown in FIG. 9, the plate member 320 of the chuck mechanism 300 is rotatable (rotated) in the D direction about a pin 345 disposed substantially parallel to the extending direction of the rod-like portions 32 and 33 of the bending lamp 30. The state is illustrated by virtual lines.)
For this reason, when the bending lamp 30 is clamped, for example, even if the outer diameters of the rod-shaped portions 32 and 33 (the clamped portions 35 and 36) are different and large, the plate member 320 is formed in the rod-shaped portions 32 and 33. Since the two rod-like portions 32 and 33 can be inclined so as to allow a difference in outer diameter when they are close to each other, the contact surfaces 321a and 322a of the plate member 320 are in contact with the sandwiched portions 35 and 36 of the bending lamp 30, and the bending lamp 30 can be securely clamped.

Therefore, when the bending lamp 30 is taken out from the bending apparatus, the bending lamp 30 does not tilt, and the bending lamp 30 does not contact the coil heaters 108, 109, etc., and the bending lamp 30 is not damaged. .
Next, the chuck mechanism 300 is rotated 180 ° by the rotation holding mechanism, and the bending lamp 30 is turned upside down. This state is shown in FIG. Also in this case, the bending lamp 30 is securely held by the chuck mechanism 300, so that it does not come off the chuck mechanism 300 even if its posture is reversed upside down.

Finally, the chuck mechanism 300 is lowered by the moving and holding mechanism 500, and the bending lamp 30 is lowered to a predetermined position. This state is shown in FIG. Then, the clamping state of the chuck mechanism 300 is released, and the bending lamp 30 is hooked on the horizontal bar 110.
<Modification>
As described above, the present invention has been described based on the embodiments. However, the content of the present invention is not limited to the specific examples shown in the above embodiments, and for example, the following modifications are possible. Can be implemented.

10 and 11 are views showing a modification of the chuck mechanism in the embodiment.
1. In the embodiment, the object sandwiched by the chuck mechanism according to the present invention is a “U” -shaped bent lamp, but the shape of the object is limited to the “U” -shape. is not.
For example, as shown in FIG. 10, a “V” -shaped object 396 may be used. That is, the object only needs to have a pair of rod-shaped portions, and the extending direction of the pair of rod-shaped portions is not limited. Therefore, when the pair of rod-shaped portions extend in parallel, it becomes a “U” shape, and the distance between the rod-shaped portions increases as the pair of rod-shaped portions moves from the connecting portion to the tip portion on the opposite side to the connecting portion. When it becomes, it becomes a "V" shape. Needless to say, an object having a shape obtained by inverting the “U” and “V” shapes may be sandwiched.

Further, in the embodiment, one object (bending lamp) in which a pair of rod-shaped portions are connected by a connecting portion is sandwiched, but two objects in which the pair of rod-shaped portions are separately independent are sandwiched. Even in this case, the chuck according to the present invention can be applied. As an example of this, there are cases where two straight tube lamps are held simultaneously (in this case, two straight tube lamps are objects).
Even in this case, even if the outer diameters of the two straight tube lamps are different, at least one of the plate members can be inclined, so that the two straight tube lamps can be securely held. However, when the pin that pivotally supports the plate member is viewed from the plate member side in the perspective direction, the extension line of the shaft needs to be attached in a state of passing at least between the two contact portions of the plate member. There is.

Furthermore, the object is not limited to a lamp. Furthermore, although the object in the embodiment is a hollow lamp (glass tube), it may be one having a solid rod-like portion, for example, a metal rod. Further, the rod-like portion may be linear as described in the embodiment, or may be curved or polygonal.
2. About member In embodiment, when the board member corresponded to the member of this invention was seen from the X direction of FIG. 5, the shape was "U" shape, The shape is other than "U" shape But it ’s okay. For example, a home base shape as shown in FIG. 10 may be used, and an inverted triangle, a rectangular shape, or the like may be used. In this case, the contact surfaces 393 and 395 that contact the object in the plate members 392 and 394 are respectively a pair of contact surfaces 311a, 312a, 321a, and 322a in the “U” -shaped plate members 310 and 320 (FIG. 5), the position where the target portion is sandwiched is the F direction (the direction of the line segment connecting the sandwiched portions) when viewed from the X direction in FIG. The effect of being able to hold even if it shifts to is obtained.

If the plate member has a “U” shape or a “V” shape as in the embodiment, for example, the bending lamp connecting portion is fixed by the fixing chuck of the bending device in the bending lamp forming step. Even in the state, the sandwiched portion of the bent lamp can be directly sandwiched between the pair of plate members.
However, in this case, it is necessary that the fixing chuck of the bending device is inserted between a pair of straight portions constituting the “U” shape of the plate member.

Moreover, although the member of the present invention has a plate shape in the embodiment, it may be configured using, for example, a rod member having a rod shape, a block member having a rectangular parallelepiped shape, or the like.
3. Regarding the Inclination Mechanism In the above embodiment, the plate member 320 is pivotally supported by the pin 345 provided on the jaw 340 and is rotated around the pin 345 to be inclined. However, the present invention is not limited to the tilt mechanism that tilts the plate member rotating around the axis of the pin.

FIG. 11 is a plan view of a chuck mechanism in which the plate member can be tilted by a mechanism different from the embodiment.
The chuck mechanism 600 shown in the figure includes a pair of plate members 610 and 620 facing each other as in the embodiment. One plate member 610 is screwed to the jaw 630, and the other plate member 620 is attached to the jaw 635 via the mounting plate 622 so that the posture thereof is changed. The jaws 630 and 635 are moved in the perspective direction by a drive unit including an air cylinder, as in the embodiment.

  The plate member 620 is attached to the mounting plate 622 through a plurality of (here, two) screws 623 and 624 so as to be movable in the thickness direction. The screws 623 and 624 to which the plate member 620 is screwed are fixed by nuts 625 and 626 in a state in which the tip side is inserted into the through holes 622a and 622b of the mounting plate 622. As a result, when the plate member 620 is pressed in the direction E shown in FIG. 11, the tips of the screws 623 and 624 protrude from the mounting plate 622.

  Between the plate member 620 and the mounting plate 622, biasing means for biasing the plate member 620 toward the other plate member 610 is provided. Specifically, this urging means is constituted by springs 627 and 628 which are externally attached to screws 623 and 624. Accordingly, for example, even if the outer diameters of the rod-shaped portions 32 and 33 (the sandwiched portions 35 and 36) of the bending lamp 30 are different and large, the plate member 620 is 2 Since it can incline along the two rod-shaped parts 32 and 33, the bending lamp | ramp 30 can be reliably clamped also with a pair of plate member 610,620 in this modification.

  A buffer material 621, for example, silicon rubber is attached to the contact surface side of the plate member 620. The cushioning material 621 is made of a material having a lower elasticity than the material constituting the plate member 620, preferably a material having a lower elasticity than the material constituting the object (here, a glass material). Thereby, the impact that the plate member 620 gives to the object when the object is sandwiched can be reduced, and for example, even when the object such as a glass tube is sandwiched, it is difficult to damage the object.

In the embodiment, since the straight tube lamp is clamped after being heated and bent, the temperature of the clamped portion of the bent lamp is high and silicon rubber or the like is not attached to the plate member. If there is a buffer material having heat resistance about the softening point of the tube, it can be attached to the plate member described in the embodiment.
The heads of the screws 623 and 624 are embedded in the plate member 620 so as not to protrude from the surface of the plate member 620 on the other plate member 610 side. In the example here, one plate member 610 has a “U” shape as in the embodiment, and the other plate member 620 connects two screws 623 and 624 (in FIG. 11, It has a long rectangular shape.

Here, the plate member 620 is held by the mounting plate 622 so as to be tiltable with respect to the plate member 610 using the two screws 523 and 524, but may be held tiltably by using four screws, for example. . In this case, the degree of freedom in the inclined direction can be made higher than that of the plate members 320 and 620 described in the above embodiment and this modification.
On the other hand, as shown in FIG. 11, when the plate member 610 is viewed from above, a pair of convex portions 613 and 614 (corresponding to the regulating member of the present invention) sandwiching the approximate center in the left-right direction of the plate member 610. Two sets are provided. When the bent lamp 30 is sandwiched between the pair of convex portions 613, 614, the bent lamp 30 corresponds to the left-right direction (corresponding to the F direction in FIG. 10 and corresponding to the “direction in which rod-shaped portions are arranged” in the present invention). It has a function to prevent deviation. Note that the distance L2 between the pair of convex portions 614 and the distance L1 between the convex portions 613 and 614 are determined in accordance with the interval between the rod-shaped portions of the bent lamp to be sandwiched.

A shock absorber 650 is provided between the pair of jaws 630 and 635. This is because the rod-shaped portions 32 and 33 of the bent lamp 30 are thin and easily broken, so that a sudden load is prevented from acting on the rod-shaped portions 32 and 33 when the bent lamp 30 is sandwiched. .
This shock absorber can be replaced by providing another mechanism, for example, a toggle mechanism in the cylinder.

4). Base (Jaw in the embodiment) The pair of jaws in the embodiment has a structure that moves in the perspective direction. For example, one of the pair of jaws is fixed, and the other jaw However, it may be a structure that moves so as to approach or separate from one jaw (this direction is the proximity direction of the present invention). That is, the pair of jaws may have a structure that moves relative to each other.

In the embodiment, the approach direction of the pair of jaws (bases) is linear. For example, the first and second bases are arranged so that the pair of bases are relatively close to each other on the circumference. A structure in which an object is sandwiched between members may be used.
Furthermore, in the embodiment, the other member that is not a tiltable member is screwed to the base. However, these members may be composed of one member. That is, the chuck includes a pair of members, and at least one member may be tilted. In the embodiment, the number of members that can be tilted is one, but the effect of the present invention can be obtained even if both members are tiltably attached to each base.

  INDUSTRIAL APPLICABILITY The present invention can be used for a chuck that can be securely clamped and a method for manufacturing a lamp using the chuck.

It is a schematic perspective view of a backlight unit. It is a figure which shows a bending lamp, and has cut out the edge part side of a lamp | ramp so that the structure of an internal electrode may be understood. It is the schematic for demonstrating the manufacturing method of a lamp | ramp. It is a schematic perspective view of an extraction device. It is a schematic perspective view of a chuck mechanism. It is the figure which looked at the chuck mechanism from the X direction of FIG. It is the figure which looked at the chuck mechanism from the Y direction of FIG. It is a figure explaining an extraction process. It is the figure which looked at the chuck mechanism from the Z direction of FIG. It is a perspective view of the chuck mechanism in a modification. It is a top view of the chuck mechanism in a modification. It is a top view of the conventional chuck mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backlight unit 30,40,50,60,70 Lamp 31 Glass tube 32,33 Bar-shaped part 200 Taking-out apparatus 300 Chuck mechanism 310,320 Plate member 330,340 Jaw 345 Pin 400 Rotation holding mechanism 500 Movement holding mechanism

Claims (6)

A first member attached to the first base; and a second member attached to the second base in a state of facing the first member, the first base and the A chuck for sandwiching an object disposed between the first member and the second member by bringing the second base relatively close to each other,
At least one of the first and second members is attached to be inclined with respect to a plane orthogonal to a proximity direction in which the first base and the second base are close to each other. A featured chuck. The object has two rod-like parts located in substantially one plane,
The chuck according to claim 1, wherein the at least one member is tiltable so as to be in contact with two rod-like portions of the object. The at least one member is pivotally supported by a shaft attached to a base corresponding to the member,
The shaft is a portion where an extension line of the shaft abuts two rod-shaped portions of the object in the at least one member when the object is viewed from the at least one member side in the proximity direction. The chuck according to claim 2, wherein the chuck is attached so as to pass between the two.   A restricting member for restricting the movement of the object in the direction in which the two rod-shaped portions are arranged is provided on a surface of the first member on the side contacting the two rod-shaped portions of the object. The chuck according to any one of claims 1 to 3, wherein the chuck is provided.   The object is a “U” -shaped glass tube, and the first and second members are in contact with a pair of rod-shaped portions constituting a “U” -shape. The chuck according to any one of 2 to 4. A method for manufacturing a lamp including a step of taking out the lamp,
The lamp is a lamp having two straight tubular lamps located in one plane or two rod-like parts located in one plane,
In the said process, the said lamp | ramp is taken out using the chuck of any one of Claims 1-5, The manufacturing method of the lamp | ramp characterized by the above-mentioned.

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