Patent Publication Number: US-7900679-B2

Title: Transfer tool

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a transfer tool including a case member having a head cap which can turn between a close position where a transfer head is covered and an open position where a transfer head is exposed. 
     2. Background of the Related Art 
     Conventionally, in a transfer tool in which a transfer tape supplied from a supply reel rotatable around a spindle is wound around a winding reel through a transfer head, a structure in which a refill which holds the supply reel, the transfer head and the winding reel is provided with a head cap which can cover the transfer head is widely used. In the transfer tool having such a structure, there is conceived a structure in which the head cap can be locked at any of the close position where the transfer head is covered and the open position where the transfer head is exposed near the pivot shaft of the head cap (see Japanese Patent Application Laid-open No. 2006-305839 for example). 
     In the structure described in Japanese Patent Application Laid-open No. 2006-305839, a recess formed in the head cap and a projection provided on a cover are engaged with each other and the head cap is locked only by moving the head cap to the close position or the open position. With such a structure, however, when an operator moves the head cap to a position near the close position or the open position and discontinues moving the head cap thereabout, since the recess and the projection are not engaged with each other, a problem that the head cap moves from a position near the close position toward the open position and the transfer head is exposed after the transfer operation is completed may occur. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished to solve the problem. 
     That is, the present invention provides a transfer tool in which a transfer tape supplied from a supply reel rotatable around a spindle is wound around a winding reel through a transfer head, comprising a transfer tool body which holds at least the supply reel and the winding reel, the transfer head provided on the transfer tool body, a head cap which is pivotally mounted on the transfer tool body or the transfer head through a pivot shaft portion and which can turn between a close position where the transfer head is covered and an open position where the transfer head is exposed, and an urging mechanism provided near the pivot shaft portion, the urging mechanism elastically capable of urging the head cap, toward the close position when the head cap is located closer to the close position than a dead point provided at only one location near an intermediate portion between the close position and the open position, and toward the open position when the head cap is located closer to the open position than the dead point. 
     With this structure, when the head cap is located between the close position and the open position, the head cap is reliably urges selectively toward the close position and the open position by the urging mechanism, and the head cap is held in any of the close position and the open position. Therefore, it is possible to avoid a problem that the head cap moves from a position near the close position toward the open position when the transfer tool is not used and the transfer head is exposed, or a problem that the head cap moves from a position near the open position toward the close position when the transfer tool is used and the head cap is suspended toward a transfer face. 
     As one example of a concrete structure of the urging mechanism, there is one in which the urging mechanism comprises a projection provided on the pivot shaft portion and a cam face provided near a bearing portion engaging with the pivot shaft portion and slidable on the projection, the head cap is urged by elastically deforming a portion of the head cap near the projection or a portion of the transfer tool body provided with the cam face in a state where the projection and the cam face abut against each other. With this structure, when the projection abuts against the cam face, any of the head cap provided with the projection and the bearing portion provided with the cam face elastically retracts. 
     As one structure for further concretely realizing the urging mechanism, there is one in which the head cap includes a cap body capable of covering a transfer tape passage of the transfer head in the close position, a pair of connecting arms extending from both side edges of the case body, and a pivot shaft portion which is provided on one end of the connecting arm and which is capable of engaging with a bearing portion provided on the cap body, and when the cam face abuts against the projection provided on the pivot shaft portion, the connecting arm is capable of elastically deforming. 
     As another structure for further concretely realizing the urging mechanism, there is one in which the head cap includes a cap body which is capable of covering a transfer tape passage of the transfer head in the close position, a pair of connecting arms extending from both side edges of the cap body, and a pivot shaft portion provided on one end of the connecting arm and capable of engaging with a bearing portion provided on the cap body, the bearing portion includes a pair of bearing elements which extend from the case body and which are provided at their tip ends with bearing recesses in which the pivot shaft portion can be accommodated, and as a projection provided on the pivot shaft turns, at least one of the bearing elements is capable of elastically deforming in a direction separating away from the other bearing element. 
     According to the structure of the transfer tool of the present invention, when the head cap is located between the close position and the open position, the head cap is reliably urges selectively toward the close position and the open position by the urging mechanism, and the head cap is held in any of the close position and the open position. Therefore, it is possible to avoid a problem that the head cap moves from a position near the close position toward the open position after the transfer operation is completed and the transfer head is exposed, or a problem that the head cap moves from a position near the open position toward the close position when the transfer tool is used and the head cap is suspended toward a transfer face. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a state where a head cap of a transfer tool according to an embodiment of the present invention is disposed in a close position; 
         FIG. 2  is a perspective view of a state where the head cap of the transfer tool of the embodiment is disposed in an open position; 
         FIG. 3  is an exploded perspective view of the transfer tool of the embodiment; 
         FIGS. 4A ,  4 B, and  4 C are a plan view, a side view and a central vertical sectional view of the transfer tool according to the embodiment; 
         FIG. 5  is a side view of a state where the first and second cases of the transfer tool of the embodiment are relatively moved to the open position; 
         FIGS. 6A ,  6 B, and  6 C are a plan view, a side view and a central vertical sectional view of the first case of the transfer tool according to the embodiment; 
         FIGS. 7A ,  7 B, and  7 C are a plan view, a side view and a central vertical sectional view of the second case of the transfer tool according to the embodiment; 
         FIGS. 8A ,  8 B, and  8 C are an explanatory diagram of effect of the urging mechanism of the transfer tool of the embodiment; 
         FIGS. 9A ,  9 B,  9 C, and  9 D are a right side view, a bottom view, a plan view and a left side view of the head cap of the embodiment; 
         FIGS. 10A ,  10 B,  10 C, and  10 D are a perspective view, a front view, a side view and a plan view of a stopping member of the embodiment; 
         FIGS. 11A ,  11 B, and  11 C are a plan view, a side view of the first case and an enlarged view near a head cap receiver according to another embodiment of the present invention; 
         FIGS. 12A ,  12 B,  12 C, and  12 D are a bottom view, a side view and a central vertical sectional view, and a plan view of the head cap of the embodiment; and 
         FIGS. 13A ,  13 B, and  13 C are an explanatory diagram of effect of an urging mechanism of the transfer tool of the embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     An embodiment of the present invention will be explained with reference to the drawings. 
     As shown in  FIGS. 1 to 5 , a transfer tool A according to the embodiment includes a transfer tool body  1  having a case portion  2  and a refill  3  which can hold the case portion  2 , a transfer head  4  which is held by the transfer tool body  1 , more specifically by the refill  3 , and a head cap  5  which is pivotally attached to the transfer tool body  1 , more specifically to the case portion  2 .  FIG. 1  is a perspective view of a state where the head cap  5  of the transfer tool A is disposed in a later-described close position P.  FIG. 2  is a perspective view of a state where the head cap  5  of the transfer tool A is disposed in a later-described open position Q.  FIG. 3  is an exploded perspective view of the transfer tool A.  FIG. 4A  is a side view of the transfer tool A,  FIG. 4B  is a bottom view of the transfer tool A, and  FIG. 4C  is a vertical sectional view taken along the center of the transfer tool A. 
     Parts constituting the transfer tool A will be explained below. In the following explanation, unless otherwise specified, “front” means a side where the transfer head  4  exists and “back” means a side opposite from the transfer head  4 . An example of a transferring object is paste, or a correcting ink coating film or the like for correcting a character or a figure written or printed on a paper sheet or a film which is an object to be transferred. 
     As described above, the transfer tool body  1  includes the case portion  2  and the refill  3  which is detachably held in the case portion  2 . The case portion  2  includes a first case  6 , a second case  7  which pairs off with the first case  6 , and a hinge  21  which connects the first and second cases  6  and  7  such that they can relatively move between a use position S and an open position O. 
     Constituent parts of the case portion  2  will be explained in more detail. As shown in  FIG. 6 , the first case  6  includes a main wall  61  forming a main body of the first case  6 , and an outer wall  62  which is integrally formed on the main wall  61  and which surrounds the main wall  61 . In the first case  6 , a refill accommodation space S in which the refill  3  can be accommodated is formed. The refill accommodation space S is defined by the main wall  61  and the outer wall  62 .  FIG. 5  is a side view of a state where the first and second cases  6  and  7  of the transfer tool A of the embodiment are relatively moved to the open position O.  FIGS. 1 ,  2  and  4  show a state where the first and second cases  6  and  7  are relatively moved to the use position S.  FIG. 6A  is a side view of the first case  6 ,  FIG. 6B  is a bottom view of the first case  6  and  FIG. 6C  is a sectional view taken along the center of the first case  6 . 
     The main wall  61  is provided therein with a supply reel mounting portion  611  for rotatably mounting a supply reel  32  of the refill  3 , and a winding reel mounting portion  612  for rotatably supporting a winding reel  33  of the refill  3 . The supply reel mounting portion  611  includes a supply reel support portion  611   a  which can rotate together with the supply reel  32  if the supply reel support portion  611   a  is inserted into a later-described meshing hole (not shown) of the supply reel  32 , and a drive gear  611   b  which is coaxially mounted on the supply reel support portion  611   a  through a slide mechanism (not shown). The winding reel mounting portion  612  is integrally formed from the main wall  61  into a substantially cylindrical shape, and the winding reel mounting portion  612  can be inserted into a later-described winding reel mounting hole (not shown) formed in a tip end of the winding reel  33 . 
     The outer wall  62  projects from a portion of the outer edge of the main wall  61  except the front end. The rear end of the outer wall  62  is formed as a hinge corresponding portion  62   a  to provide the hinge  21  on the rear end of the outer wall  62 . An outer peripheral surface of the hinge corresponding portion  62   a  is continuous with an outer peripheral surface of other portion of the outer wall  62 . The transfer head  4  passes through a head-exposing opening and is exposed outside. The head-exposing opening is a portion where the outer wall  62  is not provided. 
     As shown in  FIG. 7 , the second case  7  includes a lid  71  which substantially closes the refill accommodation space S of the first case  6 , and an outer wall  72  which projects from an outer edge of the lid  71  and its projecting end is overlapped on an outer wall  62  of the first case  6 .  FIG. 7A  is a side view of the second case  7 ,  FIG. 7B  is a bottom view of the second case  7  and  FIG. 7C  is a vertical sectional view taken along the center of the second case  7 . 
     The lid  71  is formed with insertion projections  711  and  712  which can be fitted into supported holes  34   x  and  34   y  formed in a support plate  34  at two locations corresponding to centers of the supply reel  32  and the winding reel  33 . 
     To provide the hinge  21  on the rear end of the outer wall  72 , the rear end of the outer wall  72  is formed as a hinge corresponding portion  72   a . An outer peripheral surface of the hinge corresponding portion  72   a  is continuous with an outer peripheral surface of the other portion of the outer wall  72 . 
     Front engaging part and rear engaging part are provided between the first case  6  and the second case  7  to realize a reliable engagement between the first and second cases  6  and  7 . The front engaging part engages a front engaging recess  62   x  formed in a front portion of the outer wall  62  of the first case  6  and a front engaging pawl  721  provided on the outer wall  72  of the second case  7  at a location where a position thereof in the longitudinal direction matches with the front engaging recess  62   x  in the use position S with each other. The rear engaging part engages a rear engaging recess  62   y  provided at a central portion of the outer wall  62  of the first case  6  in the longitudinal direction and a rear engaging pawl  722  with each other. The rear engaging pawl  722  is provided on a portion of the outer wall  72  of the second case  7  which matches with the rear engaging recess  62   y  in the use position S in the longitudinal direction. The rear engaging pawl  722  can move between an engaging position where the rear engaging pawl  722  engages with the rear engaging recess  62   y  and a separating position where the rear engaging pawl  722  is separated from the rear engaging recess  62   y . An operating portion  723  is provided near the rear engaging pawl  722 . If the operating portion  723  receives an operating force, the rear engaging pawl  722  elastically deforms and moves from the engaging position to the separating position. 
     On the other hand, the hinge  21  connects the first and second cases  6  and  7  with each other such that the cases can relatively move between the use position S and the open position O as described above. In this embodiment, the hinge  21  is provided inward of the outer edge of the second case  7 . More specifically, the hinge  21  is formed by utilizing a shaft member  211  projecting from the second case  7 , and a pair of bearings  212  and  212  which are provided on the first case  6  and which pivotally support the shaft member  211  from both sides thereof. An evacuation space SS is provided near the hinge  21  of the first case  6 , preferably in front of the bearings  212  and  212  for receiving the second case  7  in the close position Q. 
     The transfer tool A of the embodiment further includes a transmission mechanism which is provided between the first case  6  and the refill  3  for transmitting rotation of the supply reel  32  to the winding reel  33 . 
     The refill  3  is held between the first case  6  and the second case  7 . The refill  3  includes the supply reel  32  which holds an unused transfer tape in a state, the unused transfer tape being wounded on the supply reel  32  in the state, the winding reel  33  around which a used transfer tape film is wound, and a support plate  34  which rotatably supports the supply reel  32  and the winding reel  33  and which integrally holds the transfer head  4 . 
     The transfer head  4  can transfer a transferring object provided on a transfer tape to an object to be transferred. In this embodiment, the transfer head  4  is supported by the refill  3 , and the refill  3  and the transfer head  4  are integrally handled. 
     As shown in  FIG. 4 , the supply reel  32  includes a supply reel body  321  forming a main body of the supply reel  32 , and a meshing hole  32   x  which can accommodate the supply reel  32  when a transfer tape is pulled out from the supply reel support portion  611   a  such that rotation of the supply reel  32  can be transmitted and the meshing hole  32   x  meshes with the supply reel support portion  611   a.    
     As shown in  FIG. 4 , the winding reel  33  includes a winding reel body  331  forming a main body of the winding reel  33 , a winding reel mounting hole  33   x  which can accommodate the winding reel mounting portion  612  such that the winding reel mounting hole  33   x  can rotate with respect to the winding reel mounting portion  63 , and a follower gear  33   a  which is formed on a peripheral edge of the winding reel mounting hole  33   x  and which can mesh with the drive gear  611   b . That is, in this embodiment, the supply reel support portion  611   a  and the drive gear  611   b  which constitute the supply reel mounting portion  611 , and the follower gear  33   a  constitutes the transmitting mechanism. 
     As shown in  FIG. 4 , a front end of the support plate  34  supports a base end  41  of the transfer head  4  such that the base end  41  can not rotate. The support plate  34  is provided at its surface opposed to the first case  6  with a supply reel holding portion  341  and a winding reel holding portion  342  which rotatably hold the supply reel  32  and the winding reel  33 , respectively. Supported holes  34   x  and  34   y  are formed in the surface of the support plate  34  opposed to the second case  7  at locations corresponding to centers of the supply reel  32  and the winding reel  33 , respectively. 
     In addition, a stopping member  9  can be inserted and pulled out between the supply reel  32  and the support plate  34  to prevent the supply reel  32  from rotating when the refill  3  is transported alone. As shown in  FIG. 10 , the stopping member  9  includes a stopping body  91  inserted between the supply reel  32  and the support plate  34 , an abutting portion  92  which is provided on one end of the stopping body  91  and which abuts against the supply reel support portion  611   a  of the first case  6  when the stopping member  9  is disposed to a predetermined inserting position, a knob  93  which is provided on the other end of the stopping body  91  and which projects toward the second case  7  in a state where the refill  3  is mounted on the first case  6 , and a projection  94  which is provided on one surface of the stopping body  91  and which can be engaged with an engaging recess  34   z  formed in the support plate  34  when the stopping member  9  is disposed in the predetermined inserting position.  FIG. 10A  is a perspective view of the stopping member  9 ,  FIG. 9B  is a front view of the stopping member  9 ,  FIG. 10C  is a side view of the stopping member  9  and  FIG. 10D  is a plan view of the stopping member  9 . 
     As shown in  FIGS. 3 and 5 , the transfer head  4  includes a base end  41  integrally formed on the support plate  34  of the refill  3 , an extension plate  42  extending forward from the base end  41 , restriction plates  43  and  43  formed on both sides of the extension plate  42  as outer plates, and a transfer roller  44  which is rotatably supported by tip ends of the restriction plates  43  and  43  as folding back guide portion. The base end  41  is set such that the base end  41  can slightly deform when the transfer head  4  which is being used is pressed in this embodiment. The restriction plates  43  and  43  are provided for stably moving the transfer tape while suppressing deviation of the transfer tape sideway and for transferring the transferring object to the object which is to be transferred. That is, a transfer tape passage is formed between the restriction plates  43  and  43 . A surface of the transfer roller  44  is made of material which can elastically deform so as to press the transfer tape against the object to be transferred. An engaging portion which can prohibit the relative turning motion between the base end  41  and the case portion  2  (i.e., first case  6  and second case  7 ) is provided between the base end  41  of the transfer head  4 , the first case  6  and the second case  7 . This engaging portion is provided on the base end  41  of the transfer head  4 , and engages a cross groove  41   x  opening in a width direction of the transfer tool A and cross ribs  619  and  719  provided on the first case  6  and the second case  7  with each other. 
     The head cap  5  is pivotally supported by the first case  6  through the pivot shaft  53 . The head cap  5  can turn between the close position P where the head cap  5  can cover a tip end of the transfer head  4  and an open position Q where the tip end of the transfer head  4 , i.e., at least the restriction plates  43  and  43  and the transfer roller  44  are exposed. 
     More specifically, as shown in  FIG. 9 , the head cap  5  includes a cap body  51  which is opposed to a lower surface of the restriction plate  43  of the transfer head  4  in the close position P (surface to be opposed to an object to be transferred) and which cover a tip lower end of the transfer head  4 , connecting arms  52  extending from both end edges of the cap body  51 , and a pivot shaft portion  53  which is provided on an end of the connecting arm  52  and which is pivotally supported on a cap receiver  621  provided on the outer wall  62  of the first case  6 . The head cap  5  is located outside of an inserting and pulling out locus of the transfer head  4  when the head cap  5  is disposed in the close position P. In this embodiment, the inserting and pulling out locus of the transfer head  4  is a locus of the transfer head  4  from a position where the transfer head  4  which is integrally constituted with the refill  3  is mounted on the first case  6  to a position where it is moved by the longitudinal size of the supply reel mounting portion  611 , i.e., a projecting width from the main wall  61  in the pulling out direction. That is, the head cap  5  has a shape which is not overlapped on the transfer head  4  as viewed from side in the pulling out direction when the head cap  5  is disposed in the close position P. In other words, the head cap  5  can form a head inserting and pulling out space so that the transfer head  4  can move in the inserting and pulling out direction of the transfer head  4  in the pulling out direction of the transfer head  4 . The head cap  5  includes a head accommodating recess  5   x  in which the transfer roller  44  of the transfer head  4  can be accommodated when the head cap  5  is disposed in the close position P.  FIG. 9A  is a right side view of the head cap  5 ,  FIG. 9B  is a bottom view of the head cap  5 ,  FIG. 9C  is a plan view of the head cap  5  and  FIG. 9D  is a left side view of the head cap  5 . 
     An urging mechanism  54  which selectively elastically urges the head cap  5  toward the close position P or the open position Q is provided in the vicinity of the pivot shaft portion  53  of the head cap  5 . More specifically, as shown in  FIG. 8 , a projection  55  projects from the pivot shaft portion  53 , and a cam face portion  6   a  which can slide on the projection  55  is provided adjacent to the bearing of the first case  6 . The cam face portion  6   a  and the projection  55  slide on each other, the projection  55  and other connecting arm  52  provided on the pivot shaft portion  53  are elastically deformed, and they move toward the other connecting arm  52 . The cam face portion  6   a  has only one dead point X at which a distance between the dead point X and the axis of the pivot shaft portion  53  becomes minimum and the moving amount of the connecting arm  52  becomes maximum when the head cap  5  is located at an intermediate location between the close position P and the open position Q. The cam face portion  6   a  urges the head cap  5  toward the close position P if the head cap  5  is closer to the close position P, and toward the open position Q if the head cap  5  is closer to the open position Q.  FIG. 8A  shows a state where the head cap  5  is disposed in the close position P,  FIG. 8B  shows a state where the head cap  5  is disposed at the dead point X, and  FIG. 8C  shows a state where the head cap  5  is disposed in the open position Q. 
     As described above, according to the transfer tool A of the embodiment, the transfer tape T supplied from the supply reel rotatable around the spindle is wound around the winding reel  33  through a transfer head. The transfer tool A includes a transfer tool body  1  which holds at least the supply reel  32  and the winding reel  33 , the transfer head  4  provided on the transfer tool body  1 , concretely, on the refill  3 , the head cap  5  which is pivotally mounted on the transfer tool body  1 , more specifically, on the case portion  2  through the pivot shaft portion  53 , and which can turn between the close position P where the transfer head  4  is covered and the open position Q where the transfer head  4  is exposed, and an urging mechanism  54  provided near the pivot shaft portion  53  capable of elastically urging the head cap  5 , toward the close position P when the head cap  5  is located closer to the close position P than the dead point provided at only one location near an intermediate portion between the close position P and the open position Q, and toward the open position Q when the head cap  5  is located closer to the open position Q than the dead point. Thus, when the head cap  5  is located between the close position P and the open position Q, the head cap  5  is reliably urged by the urging mechanism  54  selectively toward the close position P and the open position Q, and the head cap  5  is held in any of the close position P and the open position Q. Therefore, it is possible to avoid a problem that after the transfer operation is completed, the head cap  5  is moved toward the open position Q from a position near the close position P and the transfer head  4  is exposed, and a problem that when the transfer tool A is used, the head cap  5  is moved toward the close position P from a position near the open position Q and the head cap  5  is suspended toward the transfer face. 
     The urging mechanism  54  comprises a projection  55  provided on the pivot shaft portion  53 , and a cam face  6   a  which is provided near the cap receiver  621  and which can slide with the projection  55 . The urging mechanism  54  has such a structure that in a state where the projection  55  and the cam face  6   a  abut against each other, a portion of the head cap  5  near the projection  55 , more specifically the connecting arm  52  is retracted by elastic deformation, and the head cap  5  is urged by the elasticity. Therefore, it is possible to realize the urging mechanism  54  with a simple structure without adding a special part such as a torsion coil spring or the like. 
     The present invention is not limited to the above-described embodiment. 
     For example, a structure as will be described with reference to  FIGS. 11 to 13  may be employed in a connection between the transfer tool body and the head cap. In the following description, portions corresponding to those in the above-described embodiment will be designated with the same names and the same symbols. 
     A head cap A 5  in this structure includes a cap body A 51  capable of covering a transfer tape passage of the transfer head  4  in the close position P, a pair of connecting arms A 52  extending from both side edges of the cap body A 51 , and a pivot shaft portion A 53  which is provided on one end of each of the connecting arms A 52  and which can be engaged with the head cap receiver A 621  which is a bearing provided on the cap body  1 . A projection A 55  constituting the urging mechanism A 54  is provided near the pivot shaft A 53 .  FIG. 12A  is a bottom view of the head cap  5 ,  FIG. 12B  is a side view of the head cap  5 ,  FIG. 12C  is a central vertical sectional view of the head cap  5  and  FIG. 12D  is a plan view of the head cap  5 . 
     The transfer tool body  1  of this structure is provided with the head cap receiver A 621  extending outward from the first case  6 . The head cap receiver A 621  includes a pair of first and second bearing elements A 622  and A 622  provided at their tip ends with bearing recesses A 622 X and A 623 X in which the pivot shaft portion A 53  can be accommodated. The first bearing element A 622  is provided on a side closer to the first case  6 , and the second bearing element A 623  is provided on a side further from the first case  6 . The bearing recess A 623 X of the second bearing element A 623  constitutes the urging mechanism A 54 .  FIG. 11A  is a plan view of the first case  6  of the embodiment,  FIG. 11B  is a side view of the first case  6  and  FIG. 11C  is an enlarged view near the head cap receiver A 621 . 
     The urging mechanism A 54  which selectively elastically urges the head cap A 5  to one of the close position P and the open position Q is provided near the pivot shaft portion A 53  of the head cap A 5 . In this structure, other portions of the transfer tool A have the same structures as those of the above-described embodiment. 
     When the head cap A 5  is located in the close position P or the open position Q, as shown in  FIGS. 13A and 13C , the projection A 55  is located in a space between the first and second bearing elements A 622  and A 623 . When the head cap A 5  is located in a position other than the close position P and the open position Q on the other hand, the bearing recess A 623   x  of the second bearing element A 623  is pressed against the projection A 55 , the second bearing element A 623  is elastically deformed and is separated from the first bearing element A 622 . The urging mechanism A 54  receives the elasticity from the second bearing element A 623 . If the head cap A 5  is located closer to the close position P than the dead point located in an intermediate portion between the close position P and the open position Q, the urging mechanism A 54  urges the head cap A 5  toward the close position P, and if the head cap A 5  is located closer to the open position Q than the dead point, the urging mechanism A 54  urges the head cap A 5  toward the open position Q.  FIG. 13A  shows a state where the head cap A 5  is disposed in the close position P,  FIG. 13B  shows a state where the head cap A 5  is disposed at the dead point X, and  FIG. 13C  shows a state where the head cap A 5  is disposed in the open position Q. 
     With this structure also, it is possible to realize the urging mechanism A 54  with a simple structure without adding a special part such as a torsion coil spring or the like. 
     Elasticity of the head cap itself or elasticity generated by elastic deformation of the bearing portion of the case may not be utilized. For example, the urging mechanism may have permanent magnets disposed near the tip end of the head cap body, and portions of the case opposed to the head caps located in the close position and the open position may be provided. 
     A bearing portion pivotally supporting the pivot shaft portion of the head cap may be provided on the transfer head instead of the transfer tool body. That is, the head cap may pivotally be mounted on the transfer head. 
     In addition, the present invention can be variously be modified within a range not departing from the subject matter of the present invention.