JP4093294B2 - Rectangular ceramic base in straight tube type infrared lamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a straight tube type infrared light bulb capable of rapid temperature rise and drop control and having a compact heating space, and more specifically, when the rectangular base of the straight tube type infrared lamp is set on a base holder. The present invention relates to a rectangular ceramic base for a straight tube infrared lamp that does not affect the lamp tube even if an error occurs in the parallelism between the straight tube infrared lamp and the base holder.
[0002]
[Prior art]
The rod-shaped straight tube infrared lamp is compact and can obtain a high temperature and can be processed under a clean condition. Therefore, there are many demands for various structures. Such a straight tube type infrared lamp is composed of a lamp tube enclosing a filament serving as a heat source and a lead wire for connecting the filament to a power source.
[0003]
As the lamp tube, for example, hollow cylindrical quartz glass is used, and both end portions in the longitudinal direction are sealed in a square shape and a flat shape so as to enclose the filament and end filaments at both ends in the longitudinal direction of the filament. Is connected to, for example, a molybdenum foil embedded in the seal portion. One end of the energizing element is connected to the molybdenum foil, and the other end is projected out of the seal portion and connected to a lead wire connected to the power supply side as an end element.
[0004]
The rectangular and flat rectangular base surrounding the sealing portion and the connecting portion with the lead wire has a rectangular base body made of, for example, a ceramic material, and is formed in a hollow storage portion. The rectangular base body has an opening for inserting the seal part into the storage part, and an opening for guiding the root part of the seal part when the square base body is inserted. An introduction hole for introducing a lead wire connected to the power source into the storage portion is formed.
[0005]
The lamp tube / rectangular base assembly is inserted into the lamp tube seal portion through an opening formed on one end face side of the square base body, and the root portion of the seal portion is guided to the opening formed on the other end face side. And insert it deep into the square base body. Thereafter, the square base body and the seal portion are integrated using an adhesive such as ceramic or cement. Next, the lead wire connected to the power source is inserted into the introduction hole drilled in the square base body, and brought into contact with the energizing element protruding from the seal portion, and the contact portion is opened on the square base body. Weld using the opening.
[0006]
[Problems to be solved by the invention]
Since the assembled straight tube type infrared lamp has a surface temperature of about 500 to 1000 ° C. when used, the straight tube type infrared lamp is designed so that the lamp tube does not touch the workpiece. That is, it is used by setting it in a state slightly lifted from the surface to be processed. For this reason, generally, a straight tube infrared lamp is set between base holders arranged corresponding to its length, and is set so that the lamp tube does not directly contact the work surface. .
[0007]
When setting the above, it is extremely difficult to match the parallelism between the center of the straight tube infrared lamp and the center of the base holder, especially when the filament and the lamp tube are lengthened to obtain a high heat quantity. Due to external conditions such as breakage after setting and thermal deformation and shrinkage of the lamp tube, the parallelism is relatively out of order, so-called errors occur, and this often causes damage to the lamp tube. It was. Furthermore, after integrating the square base body and the energizing element, the lead wire must be brought into contact with the energizing element through the lead-in hole that penetrates the square base body, and welding must be performed from outside the square base body. Becomes complicated.
[0008]
[Means for Solving the Problems]
Therefore, the present inventors pay attention to absorbing the relative parallelism error in order to solve the problem of the relative parallelism between the straight tube type infrared lamp and the base holder that supports it. As a result of earnest research, the present invention was successfully completed.
That is, the object of the present invention is to prevent the lamp tube from being damaged due to a dimensional error in the longitudinal direction of the lamp at the time of setting, assembling or using the apparatus, and further connecting the lead wire and the straight tube type infrared lamp. Providing a rectangular ceramic base in a straight tube infrared lamp suitable for mass production that can simplify the work, eliminate the need for assembly work of the rectangular base, improve the cooling effect of the seal part, and improve the life of the lamp itself It is.
[0009]
That is, in the straight tube type infrared lamp, both ends in the longitudinal direction of the lamp tube are sealed in a square shape and a flat shape to enclose the filament, and from the seal portion, an energizing element for energizing the filament is extended and the extension is extended. In a straight tube type infrared lamp in which a lead wire connected to a power source is connected to the end element, and the sealing portion and the end element and the lead wire connecting portion are surrounded by a rectangular ceramic base, side wall plates facing each other A square base having a seal housing portion for housing a lamp tube seal portion formed by upper and lower wall plates, and an opening formed on one end face side of the square base for inserting the seal portion into the seal housing portion And an energizing element extending from the seal portion formed on the other end face side of the square base and inserted into the seal housing portion. A notch portion to be squeezed, a stopper edge that protrudes in the direction of the notch portion and restricts insertion of the seal portion with respect to movement in the insertion direction when the seal portion is inserted into the seal housing portion, and the notch A lead wire which is connected to the end element within the notch and is regulated by contacting the edge of the lower wall plate formed by the notch with respect to the movement of the seal in the direction opposite to the insertion direction; and the seal When the seal portion is housed in the housing portion, the gap between the seal housing portion and the outer peripheral surface of the seal housing portion is formed in the seal housing portion. It relates to a square ceramic base.
[0010]
Further, in the present invention, the lamp tube, its seal portion, the end element extended from the seal portion, and the square base seal accommodating portion for accommodating the seal portion are arranged on the same line and orthogonal to the center line. An inverted L-shaped notch is formed in the square base in the direction, and a lead wire is connected to the end element in the notch at right angles to the center line, and on the notch side. A stopper edge is formed and formed on the upper wall plate of the square base and restricts insertion beyond a certain level with respect to the insertion direction of the seal portion, and is also formed by the above-described notch portion with respect to the movement of the seal portion in the direction opposite to the insertion direction. The present invention relates to a rectangular ceramic base of a straight tube type infrared lamp in which a lead wire comes into contact with an edge of a formed lower wall plate and is regulated.
[0011]
Furthermore, the present invention provides a rectangular tube for a straight tube infrared lamp, wherein the end element and the lead wire are connected in a notch formed in the rectangular base after the seal portion is accommodated in the seal accommodating portion. Related to ceramic base.
Furthermore, the present invention forms a notch portion having an inverted L shape in the height direction of the seal portion accommodated in the seal accommodation portion with respect to the square base, whereby the upper wall plate and both side walls of the square base are formed. The present invention relates to a rectangular ceramic base of a straight tube type infrared lamp in which a concave guide portion for guiding the seal portion is formed by a plate.
[0012]
Further, according to the present invention, when the square base of the straight tube type infrared lamp is set to the base holder, when an error occurs in the parallelism between the lamp tube and the base holder, the error is caused by the inner peripheral surface of the seal housing portion and the seal portion. A straight tube type infrared ray that is absorbed by the gap between the outer peripheral surface of the lamp and the relative parallelism between the lamp tube and the base holder is automatically adjusted so that no load is applied to the lamp tube. The present invention relates to a rectangular ceramic base of a lamp.
[0013]
Further, according to the present invention, the dimensional relationship between the square base seal accommodating portion and the lamp tube seal portion is selected such that the total height of the seal accommodating portion is slightly higher than the total height of the seal portion, and the total width of the seal accommodating portion. Is selected so as to be slightly wider than the entire width of the seal portion. When the seal portion is accommodated in the seal accommodating portion, a slight gap portion is formed between them. It relates to a square ceramic base.
[0014]
Furthermore, the present invention provides a rectangular base having a seal accommodating portion for accommodating a seal portion formed by a side wall plate and an upper and lower wall plate facing each other, and one end face of the rectangular base for inserting the seal portion into the seal accommodating portion. An opening formed on the side, and a notch that exposes an end element that is formed on the other end face side of the square base and that extends from the seal portion accommodated in the seal accommodation portion. The present invention relates to a rectangular ceramic base of a straight tube infrared lamp formed by integrally molding a rectangular base with a ceramic material.
[0015]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
The straight tube type infrared lamp is denoted by reference numeral 1 partially in FIGS. 1 and 2, and in FIG. 12, the whole example of the set state is shown. The straight tube type infrared lamp 1 is a rod-shaped quartz glass. The lamp tube 2 is provided, and a seal portion 3 in which both end portions in the longitudinal direction are sealed (see FIG. 9). The lamp tube 2 is molded into a hollow cylindrical shape except for the seal portions 3 at both ends in accordance with a conventional lamp tube molding method.
[0016]
In the lamp tube 2, for example, a filament 4 in which a tungsten coil is formed to have a spiral density designed in advance is disposed via a support ring (not shown) so as not to contact the inner peripheral surface of the lamp tube 2. And the filament 4 is enclosed in the lamp tube 2 as usual by sealing both ends of the longitudinal direction of the lamp tube 2 in a square shape and a flat shape according to a conventional method.
[0017]
The seal portion 3 is provided with end filaments 5 at both ends in the longitudinal direction of the filament 4 enclosed in the lamp tube 2, and the end filament 5 is an appropriately sized molybdenum foil 6 embedded in the seal portion 3. It is connected to one end side. The other end side of the molybdenum foil 6 is connected to an immersion end portion 7 a of the energizing element 7 immersed in the seal portion 3, and the opposite side is extended outside the seal portion 3. The extended end element 7b is connected to the lead wire 8 connected to the power source side by means such as welding.
[0018]
The connection between the end element 7 b of the energizing element 7 and the lead wire 8 is completely exposed in the notch 11 after the seal portion 3 of the lamp tube 2 is accommodated in the seal accommodation portion 10 of the square base 9. Done under the condition. That is, since the notch 11 formed in the square base 9 is completely opened, the end element 7b and the lead wire 8 are brought into contact with each other from outside the square base in the notch 11, and the contact portion is visually observed. However, it can be welded by means such as welding, for example, and the work is easy and reliable.
[0019]
Since the rectangular base 9 is formed by integral molding, it has a structure that is extremely suitable for mass production and does not require assembly work of the rectangular base itself. 4 to FIG. 7 is a substantially rectangular parallelepiped shape having side wall plates 12, 13, an upper wall plate 14, a lower wall plate 15, and an end wall plate (or stopper edge) 16 facing each other. It is formed. One end face side of the square base 9 is formed in the opening 17, the seal portion 3 is inserted from the opening 17, and the seal housing portion 10 surrounded by the side wall plates 12 and 13 and the upper and lower wall plates 14 and 15. Is housed in. The other end face side of the square base 9 is provided with an inverted L-shaped notch to the lower wall plate 15 in the side wall plates 12 and 13 leaving the stopper edge 15 (see FIG. 2).
[0020]
The cutout portion 11 formed as described above has a horizontal cutout portion 11a and a vertical cutout portion 11b, and as a cutout portion 11 having an inverted L shape on the other end face side of the rectangular base 9 as a whole. It is formed. The horizontal cutout portion 11a serves as a guide when the seal portion 3 is inserted into the seal housing portion 10 or when it is inserted and then moved in the insertion direction. Further, the end portion 7b of the energizing element 7 extending from the seal portion 3 protrudes from the vertical notch portion 11b. Therefore, since the end element 7b protrudes into the notch 11 and is completely exposed, the operation of welding the contact portion by bringing the lead wire 8 into contact therewith becomes easy.
[0021]
As shown in FIG. 3, the dimensional relationship between the square base 9 and the seal portion 3 is that the total height H between the upper and lower wall plates 13 and 14 of the seal housing portion 10 and the total height h between the upper and lower end surfaces of the seal portion 3 are as follows. H> h is selected, and the total width W between the side wall plates 11 and 12 of the seal housing portion 10 and the total width w between both side surfaces of the seal portion 3 are selected so that W> w. . Therefore, when the seal portion 3 is accommodated in the seal accommodating portion 10, a gap 18 is formed between the inner peripheral surface of the seal accommodating portion 10 and the outer peripheral surface of the seal portion 3, and the seal portion 3 is in the seal accommodating portion 10. And the external force applied to the lamp tube is absorbed.
[0022]
When the seal portion 3 is swung in the seal housing portion 10, the end element 7 b of the energizing element 7 extended from the seal portion 3 is also swung following the swing direction of the seal portion 3. . In this case, the connecting portion between the end element 7b and the lead wire 8 also swings in the notch 11 following the swinging direction, so that an external force in any direction is applied to the lamp tube 2. However, the external force applied to the lamp tube 2 in the end is released by the swinging motion.
[0023]
As shown in FIGS. 9 and 10, the assembly of the lamp tube 2 and the square base 9 is inserted into the opening 16 of the square base 9 from the end element 7 b extending from the seal portion 3, and the seal portion 3. Is pushed into the seal accommodating portion 10 and accommodated. In this case, the insertion depth is performed until the end end 7b extended from the seal portion 3 is sufficiently protruded into the cutout portion 11. Next, the lead wire 8 is brought into contact with the end element 7b protruding into the notch 11, and the contact is welded while being visually observed by means such as welding.
[0024]
As shown in FIG. 10, when the seal portion 3 is accommodated in the seal accommodating portion 10 and the entire circumference of the seal portion 3 is surrounded by the square base 9 (see FIG. 3), the total height H of the seal accommodating portion 10 and the seal portion 3. The total height h of the seal portion 3 is H> h, and the total width W of the seal housing portion 10 and the total width w of the seal portion 3 are W> w. A slight gap 18 is formed between the inner peripheral surface of the tenth. Further, the connecting portion between the end element 7b and the lead wire 8 is disposed in the notch portion 11 in a free state as shown in FIG. 10, so that the lead wire 8 follows the oscillation of the seal portion 3. The connecting portion also swings in the notch portion 17.
[0025]
As described above, since the gap 18 is formed between the inner peripheral surface of the seal housing portion 10 and the outer peripheral surface of the seal portion 3 (see FIGS. 2 and 3), the height direction and width of the seal portion 3 Even if an external force is applied in any of the direction, the longitudinal direction, and the diagonal direction, the external force is absorbed by the gap portion 18 formed between the seal portion 3 and the seal housing portion 10, that is, the gap portion 18 Since the seal portion 3 is oscillated in any direction to escape, the lead wire 8 is also oscillated in the notch portion 17 so that the lamp tube 2 is not affected by external force. Become.
[0026]
In order to use the assembled straight tube type infrared lamp 1, as shown in FIGS. 11 and 12, the rectangular bases 9 mounted at both ends in the longitudinal direction of the lamp tube 2 are fixedly arranged facing each other. The lamp tube 2 is mounted and supported on the base holder 20 and is used with the lamp tube 2 slightly lifted from the surface to be processed. In the base holder 20, the base body 21 is fixed in advance to an appropriate fixing member near the workpiece by a fixing screw 22. The base main body 21 is provided with a pair of clamping pieces 23 and 24 that face each other, and the distal end side thereof is bent to enhance the spring property.
[0027]
The clamping pieces 23 and 24 are provided with stoppers 25 and 26, respectively, to restrict the square base 9 from protruding outward from the clamping pieces 23 and 24 during or after installation. Thus, as shown in FIG. 12, the rectangular base 9 may be press-fitted and held against the spring force of the pressing pieces 23 and 24 to set a so-called straight tube type infrared lamp. At that time, even if an error occurs in the parallelism between the base holder 20 and the lamp tube 2, the error is absorbed by the gap portion 18 formed between the seal portion 3 and the seal housing portion 10. The lamp tube 2 is not loaded at all and there is no risk of breakage.
[0028]
In the above case, the end element 7 and the lead wire 8 are connected by inserting the seal portion 3 into the seal accommodating portion 10 and projecting the end element 7 b into the notch portion 11. Since the welding operation can be performed while visually observing, the operation is easy and reliable connection can be performed. Further, the connecting portion between the end element 7b and the lead wire 8 is disposed in the notched portion 11 that is completely opened, and the seal portion 3 including the connecting portion is always cooled by fresh air.
[0029]
Therefore, the seal portion 3 is not leaked due to a temperature rise, and the filament 4 is not burned out, thereby increasing the lamp life. Further, the assembly of the lamp tube and the square base does not require the use of a fixing agent, a fixing part, a fixing device, etc., so that material costs can be reduced and the process can be simplified.
The square base 9 is press-fitted between the pressing pieces 23 and 24, and the lead wire 8 is bent outwardly on the extension line of the square base 9, led out into the concave groove 21a of the base body 21, and connected to the power supply side. That's fine.
[0030]
In the embodiment of the present invention, the case where the stopper edge is formed with respect to the upper wall plate of the square base is shown and described. However, the present invention is not necessarily limited to this, and the lower wall depends on the use form. It can be formed on the plate, the upper wall plate or the lower wall plate, and the length thereof can be appropriately selected. In short, any shape can be used as long as the notch is completely open. Also good.
[0031]
【The invention's effect】
As described above, since the gap portion for error absorption is provided between the inner peripheral surface of the seal housing portion and the outer peripheral surface of the seal portion in the seal housing portion of the square base, the parallel between the lamp tube and the base holder is provided. Even if an error occurs every time, the error should be absorbed by the gap formed in the peripheral surface of the seal portion, so that the lamp tube can be reliably prevented from being damaged. Therefore, it is possible to prevent adverse effects on the lamp tube due to dimensional errors in the lamp longitudinal direction when the lamp is set, assembled, and used. In addition, the connection between the energization element and the lead wire can be easily and efficiently performed within the completely opened notch. Furthermore, since the square base is a monolithic structure, the base itself does not need to be assembled and is excellent in mass productivity. Furthermore, since the notch is opened and cooled in the atmosphere, the seal portion leaks due to temperature rise. This will not increase the lamp life.
[Brief description of the drawings]
FIG. 1 is an enlarged perspective view showing a part of a rectangular ceramic base of a straight tube infrared lamp of the present invention.
FIG. 2 is an enlarged longitudinal sectional view of a rectangular ceramic base of the straight tube infrared lamp shown in FIG. 1 (however, the lamp tube is not cross-sectional).
FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. 1 to explain error absorbing gaps formed on the entire peripheral surface of the seal portion of the lamp tube in the square base.
FIG. 4 is an enlarged vertical cross-sectional view of a square base for explaining an opening for inserting a seal portion of a lamp tube into the square base and a seal housing portion.
FIG. 5 is an enlarged bottom view seen from the lower side of FIG. 4 for explaining a notch that is a place where an end element and a lead wire are connected.
6 is an enlarged end view as viewed from the right side of FIG. 4 for explaining an opening for inserting a seal portion of the lamp tube.
7 is an enlarged end view as viewed from the left side of FIG. 4 for explaining a stopper edge for preventing the seal portion from being inserted more than necessary when or after the seal portion of the lamp tube is inserted.
FIG. 8 is an external perspective view of an integrally formed ceramic square base as viewed from the cutout side.
FIG. 9 is an enlarged perspective view of a part of a straight tube infrared lamp in which an end element connected to a filament is extended from a seal portion.
FIG. 10 is a partial view of the lamp tube seal part accommodated in the square base seal accommodation part, with the lead wire connected to the end element protruding into the notch part, as viewed from the opening side of the notch part. FIG.
FIG. 11 is a partial explanatory view of use for explaining a state in which the rectangular base is set on the base holder when the straight tube type infrared lamp of the present invention is used.
FIG. 12 is a diagram illustrating the use of the straight tube type infrared lamp of the present invention in a state in which the square base is set on the base holder.
[Explanation of symbols]
2 Lamp tube 3 Sealing portion 4 Filament 7 Energizing element 8 Lead wire 9 Square base 10 Seal receiving portion 11 Notch portion 12, 13 Side wall plate 14, 15 Upper and lower wall plate 16 Stopper edge 17 Opening portion 18 Clearance portion

Claims (7)

Leads for sealing both ends in the longitudinal direction of the lamp tube in a square shape and a flat shape to enclose the filament, extending an energizing element to energize the filament from the seal, and connecting the power to the extended end element In a straight tube infrared lamp in which a wire is connected, and the sealing portion and the connection portion between the end element and the lead wire are surrounded by a square ceramic base,
A square base having a seal accommodating portion for accommodating a seal portion of a lamp tube formed by a side wall plate and an upper and lower wall plate facing each other;
An opening formed on one end face side of the square base in order to insert the seal portion into the seal housing portion;
A notch that exposes an end element that is formed on the other end face side of the square base and extends from the seal portion inserted into the seal housing portion;
A stopper edge that protrudes in the direction of the notch and restricts insertion of the seal part when the seal part is inserted into the seal housing part with respect to movement in the insertion direction;
A lead wire connected to the end element in the notch and restricting movement of the seal portion in the direction opposite to the insertion direction to the edge of the lower wall plate formed by the notch, and
When the seal portion is accommodated in the seal accommodating portion, a gap portion formed between the inner peripheral surface of the seal accommodating portion and the outer peripheral surface of the seal portion in the seal accommodating portion,
A rectangular ceramic base for the straight tube infrared lamp. 2. The straight tube type infrared lamp according to claim 1, wherein the connection between the end element and the lead wire is performed in a notch formed in the rectangular base after the seal portion is accommodated in the seal accommodating portion. Square ceramic base. A cutout portion having an inverted L shape is formed in the height direction of the seal portion accommodated in the seal accommodating portion with respect to the square base, and thereby the above-described upper wall plate and both side wall plates of the square base are used. 2. A rectangular ceramic base for a straight tube type infrared lamp according to claim 1, wherein a concave guide portion for guiding the seal portion is formed. When setting the square base of a straight tube type infrared lamp to the base holder, if an error occurs in the parallelism between the lamp tube and the base holder, the error is caused between the inner peripheral surface of the seal housing portion and the outer peripheral surface of the seal portion. The straight tube type according to claim 1, wherein the straight tube shape is absorbed by a gap portion existing between the lamp tube and the relative parallelism between the lamp tube and the base holder is automatically adjusted so that no load is applied to the lamp tube. Infrared lamp square ceramic base. The dimensional relationship between the square base seal housing and the lamp tube seal is selected so that the overall height of the seal housing is slightly higher than the overall height of the seal, and the overall width of the seal housing is the full width of the seal. The straight tube type infrared lamp according to claim 1, wherein when the seal portion is accommodated in the seal accommodating portion, a slight gap portion is formed between them. Square ceramic base. A rectangular base having a seal accommodating portion for accommodating a seal portion formed by a side wall plate and an upper and lower wall plate facing each other, and an opening formed on one end face side of the rectangular base for inserting the seal portion into the seal accommodating portion. A rectangular base having a structure having an opening and a notch that is formed on the other end face side of the rectangular base and that exposes an end element that extends from the seal accommodated in the seal accommodating portion. 2. A rectangular ceramic base for a straight tube infrared lamp according to claim 1, wherein the rectangular ceramic base is integrally molded. The lamp tube, its seal part, the end element extended from the seal part, and the square base seal accommodating part for accommodating the seal part are arranged on the same line, and the square base is formed in the direction perpendicular to the center line. An inverted L-shaped notch is formed, a lead wire is connected to the end element in the notch perpendicularly to the center line thereof, and the seal is formed on the notch side. A stopper wall that restricts the insertion of a certain amount or more with respect to the insertion direction of the rectangular base is formed on the upper wall plate of the square base, and the lower wall is formed by the above-described notch portion to move the seal portion in the direction opposite to the insertion direction. A rectangular ceramic base for straight tube infrared lamps where the lead wire contacts the edge of the plate and is regulated.

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