Patent Document

BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention is related to a rivet tool, and more particularly to a rivet tool capable of measuring size of blind rivet. 
         [0003]    2. Description of the Related Art 
         [0004]    Blind rivets are used to fasten workpieces with a rivet tool. The advantage of using the blind rivets to fasten workpieces is that a user can operate the rivet tool at one side of the workpieces to be fastened without having to see or access the other side of the workpieces. 
         [0005]    A blind rivet has a rivet body and a mandrel. The demarcate sizes of regular blind rivets are determined by sizes of the rivet bodies instead of those of the mandrels. The sizes of the rivet bodies are 3/32″ (2.4 mm), ⅛″ (3.2 mm), 5/32″ (4.0 mm), 3/16″ (4.8 mm) and ¼″ (6.4 mm) according to specifications of American Industrial Fasteners Institute (IFI), while the sizes of the rivet bodies are 2.4 mm, 3.0 mm, 3.2 mm, 4.0 mm, 4.8 mm, 5.0 mm, 6.0 mm and 6.4 mm according to International Organization for Standardization (ISO). 
         [0006]    In collaboration with the use of blind rivets, rivet tool is an indispensable tool for fastening blind rivets on workpieces. Usually, the mandrel is inserted into a working nosepiece of the rivet tool and the rivet body is inserted into the prepared hole of workpieces. The rivet tool grips and pulls the shank of the mandrel to draw the rivet body, so that the rivet body is compressed and expanded to fasten on the workpieces. The mandrel is snapped off and the rivet body is tightly fastened the workpieces in the end. 
         [0007]    When blind rivets are shipped out of factories, rivet bodies having identical size are packed in a same package and marked with the sizes of the rivet bodies. Matching blind rivets and nosepieces must be identified before a rivet tool can correctly and smoothly draw the blind rivets. However, as blind rivets are not marked with size thereon, the unpacked and mixed blind rivets with various sizes could cause trouble in identifying matching blind rivets to use unless users are experienced and familiar with the related field. 
         [0008]    If users fail to identify matching blind rivets and nosepieces to use, blind rivets would fail to be correctly drawn and fastened. For example, if the size of a rivet body is 4.0 mm (the diameter of the matching mandrel is less than 2.41 mm) and the mandrel for the 4.0 mm rivet body is inserted into a working nosepiece corresponding to the mandrel for a 3.2 mm rivet body (the maximum inner diameter could be 2.41 mm and up), the mandrel of the 4.0 mm blind rivet may still remain inserted into the working nosepiece for the 3.2 mm rivet body, while the broken mandrel could be jammed in the working nosepiece of the rivet tool without being able to be ejected. On the contrary, if a size of a rivet body is 4.0 mm and the mandrel for the 4.0 mm rivet body is inserted into a working nosepiece matching for the mandrel corresponding to a 4.8 mm rivet body, the mandrel may not be easily gripped and fast snapped off, thereby failing to successfully break the mandrel and expedite the fixing job of workpieces. Accordingly, once the sizes of blind rivets and working nosepieces are not matching, the blind rivets not only cannot be rapidly drawn and fastened, but also many blind rivets are wasted or rivet tools need to be repaired for being jammed by the broken mandrel. Due to unmarked specification on blind rivets, except through related professional craftsmen, the problem that users cannot directly and promptly pick right blind rivets to use needs to be refined. 
       SUMMARY OF THE INVENTION 
       [0009]    An objective of the present invention is to provide a rivet tool capable of measuring size of blind rivet. 
         [0010]    To achieve the foregoing objective, the rivet tool has a body and multiple nosepieces. 
         [0011]    The body has multiple rivet body measuring holes formed therein. Each of the rivet body measuring holes has a diameter adapted to match a rivet body of a corresponding blind rivet. 
         [0012]    The nosepieces are interchangeably mounted on the body. 
         [0013]    The size of the blind rivet to be used can be rapidly determined by directly inserting the rivet body of the blind rivet into the rivet body measuring holes. Once the size of the rivet body is determined, the corresponding nosepiece can correctly picked up to mount into the working nosepiece position for operation. Given the rivet body measuring holes for measuring sizes of rivet bodies of blind rivets and the nosepieces, the whole operation of the rivet tool is efficient and convenient without having a chance to mistakenly insert an incorrect blind rivet into the rivet tool and possibly broken mandrel jammed in the rivet tool. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]      FIG. 1  is a perspective view of a first embodiment of a rivet tool capable of measuring size of blind rivet in accordance with the present invention; 
           [0015]      FIG. 2  is a partially exploded view of the rivet tool in  FIG. 1 ; 
           [0016]      FIG. 3  is another partially exploded view of the rivet tool in  FIG. 1 ; 
           [0017]      FIG. 4  is a schematic view of an actuation handle of the rivet tool in  FIG. 1  having size specifications of rivet bodies of blind rivets; 
           [0018]      FIG. 5  is an operational prospective view showing a blind rivet inserted into a rivet body measuring hole on the actuation handle in  FIG. 4 ; 
           [0019]      FIG. 6  is an operational prospective view showing a blind rivet failing to be inserted into a rivet body measuring hole on the actuation handle in  FIG. 4 ; 
           [0020]      FIG. 7  is an operational prospective view showing a wrench to assemble or disassemble a nosepiece of the rivet tool in  FIG. 1 ; 
           [0021]      FIG. 8  is a side view of a second embodiment of a rivet tool capable of measuring size of blind rivet in accordance with the present invention; 
           [0022]      FIG. 9  is a bottom view of the rivet tool in  FIG. 8 ; 
           [0023]      FIG. 10  is a side view of a third embodiment of a rivet tool capable of measuring size of blind rivet in accordance with the present invention; 
           [0024]      FIG. 11  is a bottom view of the rivet tool in  FIG. 10 ; and 
           [0025]      FIG. 12  is an another side view of the rivet tool in  FIG. 10 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0026]    With reference to  FIGS. 1 to 3 , a hand-gripped rivet tool has a body  10 , multiple nosepieces  20  and a wrench  30 . 
         [0027]    The body  10  has a fixed handle  11 , an actuation handle  12  and a pulling unit  13 . The fixed handle  11  has a first end, multiple nosepiece fixing holes  111  and a storage slot  112 . The nosepiece fixing holes  111  are formed through an outer wall of the fixed handle  11 . The storage slot  112  is formed in another outer wall of the fixed handle  11 . 
         [0028]    The actuation handle  12  has a first end and multiple rivet body measuring holes  121 . The first end of the actuation handle  12  is pivotally mounted on the first end of the fixed handle  11 . In the present embodiment, diameters of the rivet body measuring holes  121  are 3/32″ (2.4 mm), ⅛″ (3.0 or 3.2 mm), 5/32″ (4.0 mm), and 3/16″ (4.8 or 5.0 mm). With reference to  FIG. 4 , texts associated with specifications of rivet bodies and a drawing of rivet body are marked beside the corresponding rivet body measuring holes  121 . With reference to  FIGS. 5 to 7 , blind rivets having a size of a rivet body being 3/16″ (4.8 or 5.0 mm) can be smoothly inserted into the rivet body measuring holes  121  having diameters being 3/16″ (4.8 mm or 5.0 mm), but fail to be smoothly inserted into the rivet body measuring holes  121  having diameters being 5/32″ (4.0 mm), ⅛″ (3.0 mm or 3.2 mm) and 3/32″ (2.4 mm). 
         [0029]    The pulling unit  13  can be movably connected to the first end of the actuation handle  12  and has a nosepiece fixing hole  111 . 
         [0030]    The nosepieces  20  are interchangeably mounted in the pulling unit  13  and the corresponding nosepiece fixing holes  111 . Each of the nosepieces  20  has a mandrel through hole  21  having a matching diameter corresponding to the mandrel  42  of blind rivets  40 . 
         [0031]    The wrench  30  can be received in and removed from the storage slot of the fixed handle  11 . Users can use the wrench  30  to assemble or disassemble the nosepieces  20  to select where they are mounted. 
         [0032]    Besides, with reference to  FIG. 8 , an air hydraulic rivet tool has a body  50  and multiple nosepieces  20 . 
         [0033]    The body  50  has a base  51 , a pressure tank  52  and a hydraulic pulling unit  53 . With reference to  FIG. 9 , the base  51  has multiple nosepiece fixing holes (not shown), multiple rivet body measuring holes  511  and a flange  512 . The nosepiece fixing holes and the rivet body measuring holes  511  are formed through a bottom of the base  51 . Texts associated with specifications of rivet bodies and a drawing of rivet body are marked beside the corresponding rivet body measuring holes  511 . The flange  512  is formed on and protrudes downwardly from an edge of the bottom of the base  51 . In the present embodiment, diameters of the rivet body measuring holes  511  formed through the bottom of the base  51  are ⅛″(3.0 or 3.2 mm), 5/32″(4.0 mm), 3/16″(4.8 mm or 5.0 mm), 6.0 mm and ¼″ (6.4 mm). 
         [0034]    The pressure tank  52  is mounted on a top of the base  51  and has a connection portion  521  and an activation switch  522 . The connection portion  521  is formed on and protrudes upwardly from a top of the pressure tank  52  and communicates with the pressure tank  52 . The activation switch  522  is mounted on the connection portion  521 . 
         [0035]    The hydraulic pulling unit  53  is connected with the connection portion  521  and communicates with the pressure tank  52  through the connection portion  521 . 
         [0036]    The nosepieces  20  of the present embodiment have the same look as those of the hand-gripped rivet tool except that the nosepieces  20  can be mounted in the hydraulic pulling unit  53  and the nosepiece fixing holes on the bottom of the base  51 . As shown in  FIG. 8 , the nosepieces stored in the bottom of the base  51  are surrounded and blocked by the flange  512  on the base  51 . 
         [0037]    With reference to  FIG. 10 , a rechargeable battery rivet tool has a body  60  and multiple nosepieces  20 . 
         [0038]    The body  60  has a battery base  61 , a hand grip  62  and a mandrel pulling unit  63 . With reference to  FIG. 11 , the battery base  61  has multiple nosepiece fixing holes (not shown) and a flange  611 . The nosepiece fixing holes are formed through a bottom of the battery base  61 . The flange  611  is formed on and protrudes downwardly from an edge of the bottom of the battery base  61 . The hand grip  62  is formed erectly on a top of the battery base  61  and has an activation switch  621  and multiple rivet body measuring holes  622 . The activation switch  621  is formed on the hand grip  62 . With reference to  FIG. 12 , the rivet body measuring holes  622  are formed through one side of the hand grip  62 . Texts associated with specifications of rivet bodies and a drawing of rivet body are marked beside the corresponding rivet body measuring holes  622 . In the present embodiment, the hand grip  62  has multiple rivet body measuring holes  622  formed through the hand grip  62  and having diameters being ⅛″ (3.0 or 3.2 mm), 5/32″ (4.0 mm), 3/16″ (4.8 mm or 5.0 mm), 6.0 mm and ¼″ (6.4 mm). The mandrel pulling unit  63  is connected with the hand grip  62  and is electrically connected with the activation switch  621 . 
         [0039]    The nosepieces  20  have the same look as those of the hand-gripped rivet tool except that the nosepieces  20  can be interchangeably mounted in the mandrel pulling unit  63  and the corresponding nosepiece fixing hole on the bottom of the battery base  61 . As shown in  FIG. 10 , the nosepieces  20  stored in the bottom of the battery base  61  are surrounded and blocked by the flange  611  on the battery base  61 . 
         [0040]    Given the multiple rivet body measuring holes and the corresponding nosepieces, as long as users can directly insert a rivet body of a blind rivet into a matching rivet body measuring hole built in the rivet tool, a right nosepiece with corresponding size can be correctly selected for users to smoothly fasten the blind rivet with the rivet tool without wasting blind rivet or causing the rivet tool jammed by the broken mandrel. 
         [0041]    Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Technology Category: 7