JP2004249229A - Dispenser coating coating solution like cream solder and adhesive on substrate like printed board, in particular, dispenser and syringe fixed structure of dispenser head about fixed structure in which syringe, storage vessel of coating solution, is fixed to head body of dispenser head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for fixing a syringe without damaging an accuracy of positioning the direction of rotation of a dispenser head. <P>SOLUTION: Relating to a dispenser coating a coating solution like a cream solder and adhesive on a substrate like a printed board, in particular, relating to a fixed structure in which the syringe, a storage vessel of a coating solution, is fixed to a head body of the dispenser head, the dispenser head 1 provided with the syringe 4 has a head body 3 supported rotatably via a bearing 5 against a flame 2. The syringe 4 into which a coating solution is filled is inserted detachably into the head body 3. An engaging member 30 movable relatively in the parallel direction to the inserting direction of the syringe 4, which engages with the syringe 4 and regulates a displacement of the syringe in the direction opposite to the inserting direction, a compression spring 46 which urges relatively the engaging member 30 for the head body 3 to the tip side, and the like are provided. The compression spring 46, etc. are provided at the lateral portion of the inserting space of the syringe 4 in the head body 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dispenser for applying a coating liquid such as a cream solder or an adhesive on a substrate such as a printed circuit board, and more particularly to a fixing structure for fixing a syringe, which is a container for a coating liquid, to a head main body of a dispenser head. Things.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been generally known an electronic component mounting system that has a movable dispenser head and sequentially mounts electronic components such as ICs while applying a coating liquid onto a substrate such as a printed board using the dispenser head.
[0003]
The dispenser head includes a head body having a nozzle for applying a coating liquid to a substrate, a syringe containing the coating liquid, a pump for pushing out the coating liquid in the syringe to the nozzle tip, and the like. Is detachably attached to the head body for replacement.
[0004]
Conventionally, as a structure for fixing the syringe to the head body, a cylindrical attachment having a screw shaft (male thread portion) on the outer periphery is mounted on the syringe, and the syringe is attached to the mounting recess provided in the head body together with the attachment at the tip side ( This is performed by inserting the screw shaft from the application liquid outlet port) and screwing the screw shaft into a female screw formed on the inner peripheral surface of the mounting recess.
[0005]
However, in this fixing structure, since the screwing strength of the attachment to the head main body is different for each operator, for example, when the strength is low, the seal between the syringe tip and the head main body becomes incomplete and liquid leakage or the like is caused. On the contrary, when the strength is high, there is a problem that it is difficult to remove the syringe.
[0006]
On the other hand, recently, for example, a fixing structure disclosed in Patent Literature 1 is widely known.
[0007]
In the fixing structure disclosed in this document, a syringe cap having a compression spring is attached to the rear end of the syringe, the syringe is inserted into the head body, and the locking hook of the syringe cap is compressed while the compression spring is compressed. The syringe is fixed to the head main body by engaging the hook receiver. According to this fixing structure, since the compression spring is interposed between the rear end of the syringe and the syringe cap in a compressed state, the syringe is pressed against the nozzle body with a constant urging force against the head body. Will be fixed. Therefore, unlike the above-described fixing structure using screws, the fixing state of the syringe is not affected by the force of the operator.
[0008]
[Patent Document 1]
JP-A-2000-5678
[0009]
[Problems to be solved by the invention]
However, the fixing structure disclosed in the above publication has the following problems in operating the dispenser head with high accuracy. That is, the dispenser head is supported rotatably (rotatably about the R-axis) by a mechanism portion (moving mechanism portion) via a bearing so that the dispensing head can change the application direction according to the nozzle shape or the like. Although it is driven by a servomotor or the like, according to the fixing structure of the above publication, a syringe cap having a compression spring or a locking hook is attached to the rear end of the syringe away from the bearing portion (rotation fulcrum). Therefore, when rotating the dispenser head, the weight balance is poor. Therefore, for example, it is conceivable that the positioning accuracy or the like is impaired, and it is necessary to improve this point.
[0010]
Further, in the fixing structure of the above publication, a locking hook is provided to be swingable in a radial direction (radial direction of the syringe) with respect to the syringe cap, and the locking hook is provided on a flange-shaped hook receiver provided on the head body. Since the syringe is fixed by engaging from the outside in the direction, if the obstacle interferes with the rear part of the syringe, the engagement state of the locking hook may be easily released. Therefore, it is also necessary to prevent such a fixed state of the syringe from being unexpectedly released.
[0011]
Furthermore, since the compression spring is interposed between the rear end of the syringe and the syringe cap in a compressed state, when the engagement state of the locking hook is released, the return force of the compression spring helps and the syringe cap is moved. It is also conceivable that the cap may come off vigorously from the syringe, and the cap may hit a component of the apparatus to damage the apparatus or to lose the syringe cap.
[0012]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a syringe fixing structure of a dispenser head for applying a coating liquid such as cream solder to a substrate such as a printed circuit board, a syringe is provided without impairing the positioning accuracy of the dispenser head. It is an object of the present invention to make it possible to fix the syringe, more preferably to prevent the sudden release of the fixed state and the trouble accompanying it while ensuring the ease of attaching and detaching the syringe.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a syringe fixing structure of the present invention has a head body rotatably supported on a frame of a drive mechanism, having a syringe insertion portion, and a coating liquid sealed therein, and the head body has A dispenser head including a syringe removably inserted into an insertion portion, a fixing structure of the syringe to the head body,
Engaging means supported by the head body so as to be relatively movable in a direction parallel to the insertion direction of the syringe with respect to the insertion portion, and having an engagement portion engageable with the syringe from the rear side in the insertion direction. And an urging means for urging the engaging means relatively to the front side in the insertion direction with respect to the head main body, and the urging means is provided on a side of the insertion portion ( Claim 1).
[0014]
According to this structure, the syringe inserted into the insertion portion of the head body via the engagement means can be urged toward the distal end side in the insertion direction with a constant urging force. The state is not affected. Moreover, since the urging means for urging the syringe is provided on the side of the insertion portion, the center of gravity of the dispenser head is closer to the rotation fulcrum (that is, the position at which the head body is rotatably supported with respect to the frame). Is set to. Therefore, the weight balance in rotating the dispenser head is improved, and the occurrence of vibration and the like during the rotational driving can be suppressed, and the positioning accuracy in the rotating direction can be increased.
[0015]
As a more specific structure, while a flange-shaped engaged portion is formed intermittently around the syringe, an engaging portion of the engaging means is provided corresponding to the engaged portion, The syringe can be inserted into the insertion portion while the engaged portion and the engagement portion are offset from each other in the circumferential direction, and after the syringe is inserted into the insertion portion, the syringe is moved relative to the head main body. By rotating in the circumferential direction, the engaging portion and the engaged portion overlap each other in the insertion direction and engage with each other (Claim 2).
[0016]
According to this structure, after the syringe is inserted into the insertion portion, the syringe can be fixed by a simple operation of rotating the syringe relative to the head main body in the circumferential direction. Therefore, it is possible to secure a level of ease of attachment and detachment that is not inferior to that of the conventional syringe fixing structure of this type.
[0017]
Further, in this structure, it is more preferable to provide an adjusting mechanism that can change the urging force of the urging means (claim 3).
[0018]
According to this configuration, it is possible to change the urging force according to the weight of the syringe. For example, by adjusting the urging force according to the amount of the contained coating liquid, the sealing of the coating liquid outlet at the tip of the syringe can be performed. It is possible to always keep the state at the optimum state. Therefore, occurrence of troubles such as liquid leakage can be more reliably prevented.
[0019]
Further, in this structure, the engagement portion is inserted into the engagement portion with the engagement portion and the engagement portion in accordance with the relative rotation of the syringe relative to the head body in the circumferential direction. It is preferable that a tapered guide surface for guiding to a predetermined engagement position overlapping in the direction is formed (claim 4).
[0020]
According to this structure, the engagement portion and the engaged portion can be more smoothly engaged while rotating the syringe in the circumferential direction, so that the workability when fixing the syringe to the head main body is improved. .
[0021]
On the other hand, a dispenser according to the present invention includes a head unit having a dispenser head for applying a coating liquid, and as the dispenser head, a head main body rotatably supported by the head unit and the head main body in which a coating liquid is sealed. A dispenser having a dispenser head having a syringe removably inserted into the dispenser, wherein the fixing structure according to any one of claims 1 to 4 is used as a fixing structure of the syringe to the head body. (Claim 5).
[0022]
According to this dispenser, as a result of the above-described syringe fixing structure being applied to the dispenser head, it is possible to suppress vibrations and the like during rotational driving of the dispenser head and increase the positioning accuracy in the rotational direction. Therefore, the application liquid can be applied to the target object with higher accuracy.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a plan view schematically showing a dispenser to which the present invention is applied.
[0024]
As shown in the figure, a conveyer 102 for transporting a printed board is arranged on a base 100 of a dispenser, and a printed board P is transported on the conveyer 102 to a predetermined working position (a position shown in the figure). It is designed to be positioned.
[0025]
Above the conveyor 102, a head unit 104 equipped with a dispenser head 1 for applying a coating liquid for component mounting on the printed circuit board P is provided, and the head unit 104 is mounted in the X-axis direction (the direction of the conveyor 102). ) And the Y-axis direction (the direction orthogonal to the X-axis on the horizontal plane).
[0026]
That is, a pair of fixed rails 105 extending in the Y-axis direction and a ball screw shaft 106 driven to rotate by a Y-axis servomotor 107 are disposed on the base 100, and a head unit is mounted on the fixed rail 105. A support member 108 is provided, and a nut portion 109 provided on the support member 108 is screwed to the ball screw shaft 106. A guide member 110 extending in the X-axis direction and a ball screw shaft 111 driven by an X-axis servo motor 112 are provided on the support member 108 so that the head unit 104 can move on the guide member 110. A nut portion 113 provided on the head unit 104 is screwed to the ball screw shaft 111. The operation of the Y-axis servomotor 107 rotates the ball screw shaft 106 to move the support member 108 in the Y-axis direction, and the operation of the X-axis servomotor 112 causes the ball screw shaft 111 to rotate. 104 moves in the X-axis direction with respect to the support member 108.
[0027]
The head unit 104 is provided with a plurality of dispenser heads 1 for applying different types of coating liquids to the printed circuit board P. In the illustrated example, two dispenser heads 1 are mounted.
[0028]
2 and 3 show the configuration of the dispenser head 1. FIG. 2 is a front view (partially sectional view) of a state in which a syringe is inserted, and FIG. 3 is a front view before the syringe is inserted.
[0029]
As shown in these figures, a dispenser head 1 has a head body 3 rotatably supported by a frame 2 of a driving mechanism (not shown) and a coating liquid which is detachably inserted into the head body 3. And a syringe 4.
[0030]
The syringe 4 is a vertically elongated shaft-shaped container as shown in FIG. 5, and its lower end (tip) is formed to be tapered, and a lead-out portion 10 for drawing out the coating liquid is provided at the end. ing.
[0031]
On the other hand, an accommodation port (not shown) for accommodating the coating liquid is provided at the upper end (rear end) of the syringe 4, and extends in a direction opposite to each other radially outward with respect to the accommodation port. A flange 11 (locked portion) is provided.
[0032]
A syringe cap 12 is attached to the upper end of the syringe 4. The syringe cap 12 has a cover plate 14 having gripping portions 14a and 14b having a U-shaped cross section that open inward from each other on both sides, and the flanges 11 of the syringe 4 are moved outward by the gripping portions 14a and 14b. It is attached to the upper end of the syringe 4 in a state where the syringe 4 is gripped. A rubber cap body 16 (see FIG. 2) is fixed to the lower surface of the cover plate 14. When the syringe cap 12 is attached to the syringe 4 as described above, the cap body 16 is inserted into the accommodation opening. The space between the inner peripheral surface of the storage port and the outer peripheral surface of the cap body 16 is sealed, and as a result, the storage port is closed.
[0033]
An air hose 18 communicating with the inside of the syringe through the cap body 16 is connected to an upper portion of the cover plate 14, and when air is supplied from the air supply source (not shown) into the syringe 4 via a valve, the air is supplied to the syringe. The application liquid is drawn out from the syringe 4 via the nozzle 22 described later according to the pressure.
[0034]
To attach the syringe cap 12 to the syringe 4, first, the cover plate 14 is pressed against the upper end of the syringe with the grips 14a, 14b and the flanges 11 shifted in the circumferential direction, and the cap body 16 is inserted into the housing opening. Then, the cover plate 14 is rotated relative to the syringe 4 in the circumferential direction, and the flanges 11 are inserted into the grips 14a and 14b from the side portions. The removal of the syringe cap 12 can be performed by the reverse procedure.
[0035]
On the other hand, as shown in FIGS. 2 and 3, the head body 3 has a shaft nozzle 20 which is elongated in the vertical direction and has a concave portion 20a for inserting the syringe 4 which opens upward. The shaft nozzle 20 is rotatably supported by the frame 2 via a bearing 5, and a coupling member 24 for coupling the nozzle 22 and the lead-out portion 10 of the syringe 4 is incorporated at a lower end thereof. Have been. That is, when the syringe 4 is inserted into the insertion concave portion 20a from the front end side (lower end side), the passage of the outlet portion 10 matches the coupling member 24, and the syringe 4 and the nozzle 22 are in communication with each other. Thereby, the coating liquid in the syringe 4 can be led out to the nozzle 22.
[0036]
At a position where the shaft nozzle 20 is supported by the bearing 5, that is, at a position below the rotation fulcrum of the head body 3, a drive gear 26 with a sleeve is externally attached to the shaft nozzle 20 integrally. A drive belt 28 is stretched around. As a result, the rotational driving force of a motor (not shown) is transmitted to the shaft nozzle 20 via the drive belt 28 and the drive gear 26, and as a result, the nozzle 22 attached to the shaft nozzle 20 is rotated around its central axis (around the R axis). ) Is driven forward and reverse.
[0037]
A pair of engaging members 30 for fixing the syringe 4 to the shaft nozzle 20 are provided at the upper end of the shaft nozzle 20 with a space for inserting the syringe 4 interposed therebetween. In the dispenser head 1 of the present embodiment, the insertion space (the space between the two engagement members 30) and the insertion recess 20a of the shaft nozzle 20 constitute an insertion portion of the syringe 4 in the present invention. .
[0038]
These engaging members 30 are provided facing each other as shown in FIGS. 2 to 4 and 6, and each engaging member 30 is provided with an engaging recess 32 for engaging the syringe 4. Have been.
[0039]
The engaging recess 32 is formed in a U-shape that opens in the circumferential direction as shown in FIG. 4, and the flange 11 of the syringe 4 is inserted into the engaging recess 32 as described later in detail. Accordingly, the syringe 4 and each of the engagement members 30 are engaged with each other, so that the displacement of the syringe 4 in the direction opposite to the insertion direction (upward in FIG. 2) is regulated. To be precise, what is inserted into the engagement recess 32 is the flange portion 11 and the cover plate 14 (grip portions 14a, 14b) attached to the collar portion. The one inserted into the concave portion 32 will be described as the flange portion 11.
[0040]
The engagement recesses 32 of each engagement member 30 are configured to open in the same direction in the circumferential direction, and the upper wall surface 34 (the engagement portion of the flange portion 11) of the engagement recess 32 is provided with the flange of the syringe 4. A tapered guide surface 34a for guiding the portion 11 into the engagement recess 32 is formed.
[0041]
Each of the engaging members 30 is supported so as to be displaceable in a vertical direction (a direction parallel to the insertion direction of the syringe 4) along a pair of guide members 42 erected at the upper end of the shaft nozzle 20, and is compressed. The elastic force of the spring 46 urges the shaft nozzle 20 toward the lower end thereof (the front side in the insertion direction of the syringe 4).
[0042]
More specifically, as shown in FIGS. 3 and 4, the upper end of the shaft nozzle 20 is provided with a guide portion 44 having a guide portion 44 protruding radially opposite to each other (radially outward of the shaft nozzle 20). A pair of guide members 42 of a mold are provided, and respective guide portions 44 of these guide members 42 are inserted into the vertically elongated guide holes 36 provided in the engagement member 30 from the radial inside. . Long holes 38 in the vertical direction are respectively formed on both side surfaces (left and right side surfaces in FIG. 4) of the engaging member 30, and the bolts 40 extend from both outer sides (left and right outer sides in FIG. 4) of the engaging member 30 respectively. It is screwed into the screw hole of the guide part 44 through the hole 38. With this configuration, the engagement member 30 is configured to be vertically displaceable relative to the shaft nozzle 20 within the range of the guide hole 36 while being guided along the side surface of the guide portion 44.
[0043]
As shown in FIG. 2, the guide portion 44 of each guide member 42 is provided with a concave portion 45 that opens downward, and a support plate 48 that is attached to an upper wall in the concave portion 45 and the guide hole 36. A compression spring 46 is interposed with the lower wall 36a in a compressed state. With this configuration, the engaging member 30 is urged toward the lower end side of the shaft nozzle 20 by the elastic force (urging force) of the compression spring 46.
[0044]
As shown in FIG. 8, the support plate 48 is fixed to the tip (lower end) of a screw shaft 49 made of, for example, a hexagonal set screw, and the screw shaft 49 is formed on the upper wall of the recess 45. It is assembled by being screwed into the hole 44a from the inside of the concave portion 45. That is, the compression state of the compression spring 46 can be changed by rotating the screw shaft 49 to change the height position of the support plate 48, and this configuration allows the urging force of the engagement member 30 to be increased or decreased. It has become.
[0045]
As shown in FIGS. 2 and 7, the screw hole 44a vertically penetrates the upper wall of the concave portion 45, and the engaging member 30 has a penetrating hole penetrating in the vertical direction coaxially with the screw hole 44a. Holes 50a and 50b are formed. Thus, a tool can be inserted into the screw hole 44a from above the engaging member 30 through the through holes 50a and 50b to adjust the urging force, that is, to easily perform the rotation operation of the screw shaft 49. In this embodiment, the support plate 48, the screw shaft 49, the screw hole 44a, and the like constitute an urging force adjusting mechanism.
[0046]
In the dispenser head 1 as described above, in order to insert the syringe 4 into the head main body 3, first, as shown in FIG. 5, a syringe cap 12 is inserted into the syringe 4, and the syringe 4 is connected to both engagement members. The shaft nozzle 20 is inserted into the insertion recess 20a of the shaft nozzle 20 from the lower end through the space between the gaps 30 (see FIG. 3). At this time, as shown by the two-dot chain line in FIG. 7, the syringe 4 is inserted into the insertion recess 20a while the flanges 11 of the syringe 4 and the engaging members 30 are shifted in the circumferential direction.
[0047]
At this stage, as shown in FIG. 3 and FIG. Although not shown, the relationship between the syringe 4 and the engagement recess 32 of each engagement member 30 is such that the upper surface of the flange 11 (the upper surface of the cover plate 14) is the upper wall surface of the engagement recess 32. 34 is located slightly above.
[0048]
Next, the syringe 4 is rotated in the circumferential direction relatively to the shaft nozzle 20. When the syringe 4 is rotated in this manner, the upper surface of the flange 11 (the upper surface of the cover plate 14) is guided into the engagement recess 32 along the tapered guide surface 34a, and as a result, FIGS. As shown in a solid line), each flange 11 of the syringe 4 is inserted into the engagement recess 32 of each engagement member 30.
[0049]
When the flange 11 is inserted into each of the engagement recesses 32 in this manner, the engagement member 30 is pushed back in the direction opposite to the insertion direction of the syringe 4 against the elastic force of the compression spring 46. As a result, the resilient force of the compression spring 46 acts on the syringe 4 via the flange 11, so that the syringe 4 is urged toward its distal end, and the flange 11 and the upper wall surface of the engaging recess 32. As a result, the displacement of the syringe 4 in the pull-out direction (the direction opposite to the insertion direction) is restricted. Thus, the syringe 4 is fixed to the head main body 3 in a state where the syringe 4 is urged toward the nozzle 22.
[0050]
According to the fixing structure of the syringe 4 in the dispenser head 1 as described above, the syringe 4 is fixed to the head main body 3 in a state where the syringe 4 is urged toward the distal end side by a constant urging force by the elastic force of the compression spring 46. The fixed state of the syringe 4 fixed to the main body 3 does not depend on the force of the operator.
[0051]
In addition, in this fixed structure, the engagement member 30 is engaged with the syringe 4 as described above to urge the engagement member 30 toward the nozzle 22. However, the engagement member 30 is urged. (The urging means), that is, the guide member 42 and the compression spring 46 are arranged on the side of the insertion space of the syringe 4, so that the generation of vibrations and the like when the dispenser head 1 is rotationally driven is suppressed. Therefore, there is an advantage that the positioning accuracy in the rotation direction can be ensured well. That is, according to this fixing structure, since the members such as the compression spring 46 are arranged on the side of the insertion space of the syringe 4, the conventional dispenser head of this kind, that is, the compression spring or the like is mounted on the upper end (rear end) of the syringe. As compared with the dispenser head (see Patent Document 1), the center of gravity of the dispenser head 1 is located closer to the rotation fulcrum, that is, the bearing 5. Therefore, a good weight balance is obtained when the dispenser head 1 is rotationally driven, and the occurrence of vibration during the rotational driving can be effectively suppressed.
[0052]
Further, in this fixed structure, the syringe 4 and the shaft nozzle 20 are relatively rotated in the circumferential direction, and the flanges 11 of the syringe 4 are inserted into the engagement recesses 32 of the engagement members 30, whereby the syringe 4 is moved. Since the upper surface of the syringe cap 12 and the upper wall surface 34 of the engaging recess 32 are pressed against each other by the elastic force of the compression spring 46 in this fixed state, the upper end of the syringe 4 is fixed. Even when the portion interferes with another member, the engagement state between the syringe 4 and each engagement member 30 is not easily released. Therefore, it is possible to prevent a trouble that the fixed state of the syringe 4 is suddenly released.
[0053]
In addition, in this fixing structure, even when the fixed state of the syringe 4 is released, the state of the syringe cap 12 being inserted into the syringe 4 is maintained, so that when the fixed state of the syringe 4 is released, the syringe cap 12 is released. There is also an advantage that troubles such as detachment and damage to the component parts of the apparatus or loss of the syringe cap 12 can be effectively prevented. That is, in this type of conventional dispenser head (Patent Document 1), the syringe is fixed by engaging a locking hook provided on the syringe cap with the head main body, and a gap between the syringe rear end and the syringe cap is provided. Since the syringe is biased by the resilient force of the compression spring interposed in the syringe, the resilient force of the compression spring assists when the engagement state of the locking hook is released, so that the syringe cap vibrates from the syringe. It is possible that the syringe cap may collide with a component of the device or may be lost as a result. However, according to the dispenser head 1 of the embodiment, even when the fixed state of the syringe 4 is released, the syringe 4 is closed independently by the syringe cap 12, so that the syringe cap 12 does not fall off unexpectedly. Therefore, the above-mentioned trouble does not occur at all.
[0054]
Furthermore, in the fixing structure of the embodiment, since the syringe 4 and the shaft nozzle 20 are simply rotated relatively in the circumferential direction after the syringe 4 is inserted into the shaft nozzle 20 as described above, the operation at the time of fixing is also simple. . In particular, the engaging recess 32 of the engaging member 30 is formed with a tapered guide surface 34a on an upper wall surface 34, and smoothly inserts and guides the flange portion 11 (grip portions 14a, 14b) into the engaging recess 32. Therefore, the work of fixing the syringe 4 to the head body 3 can be easily performed at a level comparable to the conventional structure.
[0055]
The fixing structure of the syringe 4 and the configuration of the dispenser head 1 described above are examples of the syringe fixing structure according to the present invention and the dispenser head to which the fixing structure is applied. Can be changed as appropriate without departing from the spirit of the invention.
[0056]
For example, in this embodiment, the biasing force is applied to each of the engagement members 30 by providing the compression springs 46 individually for each of the engagement members 30. However, both the fixing members 30 are biased by the common compression spring. You may comprise. Specifically, a configuration may be adopted in which a compression spring having a diameter capable of surrounding the syringe 4 is interposed between each engagement member 30 and the guide member 42.
[0057]
In the embodiment, the flange 11 is provided at the rear end of the syringe 4 so that the flange 11 and the engaging member 30 are engaged with each other. (Part), a flange 11 may be provided to engage with the engagement member 30.
[0058]
Further, the guide member 42 is omitted, and the engaging member 30 is directly displaceably assembled to the shaft nozzle 20, for example, and a spring is provided between the shaft nozzle 20 and the engaging member 30 to engage. The member 30 may be biased. The spring is not limited to a compression spring but may be a tension spring. It is also possible to use rubber instead of the spring.
[0059]
【The invention's effect】
As described above, the syringe fixing structure of the present invention allows the head body having the syringe insertion portion to be relatively movable in the direction parallel to the syringe insertion direction, and to engage with the syringe inserted in the insertion portion. An engaging means for restricting the displacement of the syringe in a direction opposite to the syringe insertion direction, and an urging means for urging the engaging means relative to the head body toward the front end side in the insertion direction, By providing the biasing means on the side of the insertion portion, the center of gravity of the dispenser head is set to a position closer to the rotation fulcrum, so that the weight balance in rotating the dispenser head is improved, and the nozzle rotation drive The occurrence of vibration and the like at the time can be suppressed, and the positioning accuracy in the rotation direction can be improved.
[0060]
Further, according to the dispenser of the present invention, as a result of applying the above-described syringe fixing structure to the dispenser head, it is possible to suppress vibrations and the like during rotational driving of the dispenser head and increase the positioning accuracy in the rotational direction. Become. Therefore, the application liquid can be applied to the target object with higher accuracy.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an entire dispenser to which the present invention is applied.
FIG. 2 is a front view (partially sectional view) showing a configuration of a dispenser head.
FIG. 3 is a front view showing a configuration of a dispenser head (before a syringe is inserted).
FIG. 4 is a view on arrow A of FIG. 3 showing a configuration of a fixing member.
FIG. 5 is a perspective view showing a configuration of the syringe (with a syringe cap attached).
FIG. 6 is a plan view showing a configuration of a head main body.
FIG. 7 is a plan view showing a procedure for inserting a syringe into the head main body.
FIG. 8 is an enlarged sectional view of a main part of a guide member, showing a configuration for adjusting a biasing force of a fixing member.
[Explanation of symbols]
1 Dispenser head
2 frames
3 Head body
4 syringe
5 Bearing
11 Flange (engaged part)
12 syringe cap
20 Shaft nozzle
22 nozzles
30 Engagement member
32 engagement recess
34 Upper wall surface (engagement part)
34a tapered guide surface
42 Guide member
46 Compression spring

Claims (5)

A dispenser including a head body having a syringe insertion portion and rotatably supported with respect to a frame of a drive mechanism, and a syringe filled with a coating liquid and detachably inserted into the insertion portion of the head body. A structure for fixing a syringe to the head body of the head,
Engaging means supported by the head body so as to be relatively movable in a direction parallel to the insertion direction of the syringe with respect to the insertion portion, and having an engagement portion engageable with the syringe from the rear side in the insertion direction. And an urging means for urging the engaging means relative to the head body toward the front in the insertion direction, wherein the urging means is provided on a side of the insertion portion. Syringe fixing structure of dispenser head. The syringe fixing structure of the dispenser head according to claim 1,
A flange-shaped engaged portion is formed intermittently around the syringe, and an engaging portion of the engaging means is provided corresponding to the engaged portion. By inserting the syringe into the insertion portion in a state where the portions are offset from each other in the circumferential direction, and by inserting the syringe into the insertion portion, by rotating the syringe relative to the head body in the circumferential direction. A syringe fixing structure for a dispenser head, wherein the engaging portion and the engaged portion overlap each other in the insertion direction and engage with each other. The syringe fixing structure of the dispenser head according to claim 1 or 2,
A syringe fixing structure for a dispenser head, comprising: an adjusting mechanism capable of changing an urging force of the urging means. 3. The syringe fixing structure for a dispenser head according to claim 2, wherein the engaging portion includes the engaging portion and the engaged portion, as the syringe rotates relative to a head body in a circumferential direction. A syringe fixing structure for a dispenser head, wherein a tapered guide surface for guiding the engaged portion is formed at a predetermined engagement position overlapping in the insertion direction. A head unit having a dispenser head for applying a coating liquid; a head body rotatably supported by the head unit as the dispenser head; and a syringe filled with the coating liquid and detachably inserted into the head body. In a dispenser having a dispenser head having
A dispenser, wherein the fixing structure according to any one of claims 1 to 4 is used as a fixing structure of the syringe to the head body.

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