JP2009275487A - Reinforcement binding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and surely discharge foreign matter such as wire fragments 26 get mixed on a lower curl guide 10. <P>SOLUTION: In a reinforcement binding machine 1, a curl guide 5 forming a winding tendency to a wire 4 for a binding from a wire reel and forwarding the wire for the binding to a lower section and the lower curl guide 10 receiving the wire 4 and guiding the wire 4 to the upper curl guide 5 again are projected and arranged from the front end of a binding machine body 2 while the base section of the lower curl guide 10 is fitted rotatably to a lower section to a support shaft 23 fitted to the front section of the binding machine body 2. In the reinforcement binding machine 1, a section fronter than the base section of the lower curl guide 10 is fitted so as to be projected to a front from the lower section of a curl-guide cover 24 formed to the front section of the support shaft. In such a reinforcement binding machine 1, an opening section 25 opened to the section fronter than at least the curl-guide cover 24 is formed to the lower curl guide 10, and the foreign matter get mixed on the lower curl guide 10 are discharged from the opening section 25. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reinforcing bar binding machine that receives a binding wire fed downward with a curl hook and easily discharges foreign matter dropped on a lower curl guide that guides it upward again.

In a conventional reinforcing bar binding machine, kerf guides for curling a wire with a curl are arranged up and down. The lower curl guide is provided so as to be openable and closable. By opening and closing the lower curl guide, the wire after binding is easily pulled out from the binding machine body. The opening / closing structure also has a function as a safety device. When the lower curl guide is open, it is judged that there is a finger or a tool for maintenance or something is caught in an abnormal state. Is not working. In order to send the opening / closing signal of the lower curl guide to the binding machine body, an opening connecting the inside and the outside of the nailing machine body is required. The sensor for detecting the lower curl guide is disposed inside the binding machine body to avoid the influence of dust, impact, and disturbance, and mechanically transmits a signal from the outside of the binding machine body to the inside. Therefore, a relatively large opening is formed in the signal transmission part of the binding machine body.
Japanese Patent No. 3496463 Japanese Patent No. 3050517

  However, in the conventional reinforcing bar binding machine, when the lower curl guide is closed, the opening is also closed by the curl guide cover, so that foreign matter such as a small piece of wire does not easily enter the binding machine body. When the thread is cut or the wire reel is finished, the cut piece of wire may fall into the lower curl guide. When the lower curl guide is opened, an opening is created between the lower curl guide and the curl guide cover. May get inside the machine. In addition, the space between the lower curl guide and the curl guide cover is not completely closed, and a small gap is formed. A small piece of wire may slide down the lower curl guide and enter the binding machine main body through the gap.

  As described above, when the wire piece enters the main body, there is a possibility that problems such as being caught in the movable part, entering into the motor, locking the motor, or deviating detection of the magnetic sensor may occur. Will lead to malfunction of the rebar binding machine.

  An object of the present invention is to solve the above-mentioned problems and to provide a reinforcing bar binding machine provided with a mechanism that can easily and reliably discharge foreign matters such as a small piece of wire mixed in on a lower curl guide.

  In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a curling guide that feeds a binding wire sent from a wire reel and winds it downward, and receives the wire and guides it to an upper curling guide again. A lower curl guide that protrudes from the front end of the binding machine body, and a base portion of the lower curl guide is provided on a support shaft provided at a front part of the binding machine body so as to be pivotable downward. In a reinforcing bar binding machine in which a portion in front of the base portion of the curl guide protrudes forward from a lower portion of a curl guide cover formed at a front portion of the support shaft, the lower curl guide includes at least the curl guide An opening that opens to the front of the cover is formed, and foreign matter mixed in on the lower curl guide is discharged from the opening.

  The invention according to claim 2 is characterized in that, in claim 1, the rear end of the opening is extended to a position immediately below the support shaft, and the lower portion of the curl guide cover is made to enter the opening. To do.

  The invention according to claim 3 is characterized in that, in claim 2, a lower piece portion extending rearward from a lower end portion of the curl guide cover is formed, and the opening portion is filled with the lower piece portion.

  According to the first aspect of the present invention, the base portion of the lower curl guide is provided on the spindle provided at the front portion of the binding machine main body so as to be pivotable downward, and the portion in front of the base portion of the lower curl guide is In the reinforcing bar binding machine provided so as to protrude forward from the lower part of the curl guide cover formed at the front part of the support shaft, the lower curl guide has an opening opening at least forward of the curl guide cover In this way, the foreign matter mixed in on the lower curl guide is discharged from the opening, so that the foreign matter is discharged from the opening even when the curl guide is closed. Therefore, the foreign matter does not enter the inside of the binding machine main body.

  According to the invention of claim 2, the curl guide is opened because the rear end of the opening extends to the vicinity of the immediate lower part of the support shaft, and the lower part of the curl guide cover enters the inside of the opening. Sometimes, the curl guide cover serves as an obstacle wall for foreign matter to enter the binding machine body.

  According to the invention of claim 3, since the lower piece portion extending rearward from the lower end portion of the curl guide cover is formed and the opening portion is filled with the lower piece portion, the lower curl guide is rotated to open. Even so, there is no gap between the opening and the curl guide cover so that foreign matter can enter.

  In FIG. 1, reference numeral 1 denotes a reinforcing bar binding machine. In the reinforcing bar binding machine 1, a wire reel (not shown) around which a reinforcing bar binding wire 4 is wound is mounted in a storage chamber 3 provided in the binding machine body 2, and the wire 4 is bound while rotating the wire reel. It is sent to a curl guide 5 provided at the tip of the machine body 2, and the wire 4 is wound around the wire 4 by the curl guide 5 and sent around the reinforcing bar 6, wound around the wire bar 4, and then the original side of the wire 4 is cut. At the same time, the wound portion is twisted to bind the reinforcing bars 6 together.

  The binding machine body 2 is provided with a guide tube 7 through which the wire 4 drawn from the wire reel is passed. One end of the guide tube 7 opens into the storage chamber 3, and the other end opens at the base of a curl guide 5 described later. A pair of feed gears (not shown) are disposed in the middle of the guide tube 7 as a feed means for the wire 4. The wire 4 is sandwiched between feed gears and is sent out by its rotation.

  When the switch is turned on by the trigger 8, the electric motor rotates and the wire feed gear rotates. And the wire 4 wound around the wire reel accommodated in the storage chamber 3 is sent to the front of the binding machine body 2 through the guide tube 7 by the rotation of the wire feed gear.

  At the front end of the binding machine body 2, the curl guide 5 that feeds the wire 4 that has been sent from the wire reel and wound downward, and the wire 4 that has been sent by the curl guide 5 is again connected to the upper curl guide 5. A lower curl guide 10 is provided so as to protrude so as to return to a predetermined position. The tip of the curl guide 5 is curved in an arc shape, and is wound around the reinforcing bar 6 in a loop around the reinforcing bar 6 by attaching a curling hook here.

  The curl guide 5 is provided with wire cutting means (not shown). The wire cutting means is configured to cut the wire when the feed amount of the wire 4 reaches a predetermined amount.

  Inside the binding machine main body 2, a wire twisting device 11 having a twisting hook 12 at the tip is disposed.

  The wire twisting device 11 moves the sleeve 13 pivotally attached to the hook 12 so that the hook 12 can be opened and closed by the electric motor 14 to close and operate the hook 12, thereby winding the wire 4 wound around the reinforcing bar 6 in a loop shape. After gripping, the hook 12 is rotated together with the sleeve 13 to twist the wire 4 to bind the rebar 6, and then the hook 12 is reversely rotated and the sleeve 13 is moved backward to be detached from the wire 4 to return to the initial position. It is what I did. The wire 4 is twisted after the wire 4 is cut along with the forward movement of the sleeve 13.

  The rotation of the feed gear, the cutting of the wire 4, the operation of the wire twisting device 11 and the like are sequence-controlled by a control circuit (not shown). The control circuit also measures the feed amount of the wire 4 based on the rotation amount of the feed gear.

  By the way, a guide groove 15 is formed in the front portion of the lower curl guide 10 so that the front end is wide, and a plate-like portion 19 (see FIG. 3 for details) is formed in the rear portion. Guide members 16 disposed on both sides of the base portion of the guide groove 15 and guiding the wire 4 so as not to be scattered left and right are integrally fixed to the plate-like portion 19. The guide member 16 is fixed to both sides of the plate-like portion 19. The rising edge 18 is formed at a position corresponding to the above, the base of the rising edge 18 is further raised, and the bearing hole 20 is formed.

  A support plate 21 is formed at a front portion of the binding machine body 2 at a position corresponding to the base of the lower curl guide 10, and a support shaft 23 is attached to support pieces 22 that are suspended from both sides thereof. Both ends of the shaft 23 are rotatably supported in the bearing holes 20 of the lower curl guide 10. The lower curl guide 10 is urged by the torsion coil spring 17 mounted around the support shaft 23 so as to be normally in the position shown in FIGS. 1 to 3, and the support shaft 23 is centered as necessary. As shown in FIGS. 3 to 5, it is configured to be able to rotate downward.

  Further, since the front portion of the support shaft 23 is open, a curl guide cover 24 is provided here. The curl guide cover 24 is substantially U-shaped in a lateral direction from an upper piece 24a, a central piece 24b hanging from the front end of the upper piece 24a, and a lower piece 24c extending rearward from the lower end of the central piece 24b. Is formed. The lower curl guide 10 is provided so as to protrude forward from the lower part of the curl guide cover 24.

  An opening 25 is formed in the plate-like portion 17 of the lower curl guide 10. The opening 25 is formed so as to open from a position ahead of the curl guide cover 24 to a position slightly rearward of a portion directly below the support shaft 23. Thereby, a part of the opening 25 is opened at a position ahead of the curl guide cover 24. Further, the lower piece 24 c of the curl guide cover 24 enters the inside of the opening 25 and fills the other part of the opening 25.

  According to the above-described configuration, the foreign matter such as the cut wire piece 26 is removed from the lower curl guide when the binding machine is started to be used, the wire 4 is twisted or cut, or when the wire 4 is removed from the wire reel. 10, and further moves toward the curl guide cover 24, the foreign matter 26 is discharged from the opening 25 because the opening 25 is formed in front of the curl guide cover 24. Therefore, the wire piece 26 does not enter the inside of the binding machine body 2.

  In addition, the small wire piece 26 at the boundary between the curl guide 5 and the curl guide cover 24 is also pushed out relative to the curl guide cover 24 by the spring force when the curl guide 5 is closed and discharged.

  Further, since the rear end of the opening 25 is extended to the vicinity of the immediate lower portion of the support shaft 23 and the lower portion of the curl guide cover 24 is inserted into the opening 25, as shown in FIGS. Even when the curl guide 5 is opened, the central piece 24b of the curl guide cover 24 functions as an obstacle wall for the foreign matter 26 to enter the binding machine body 2.

  Further, when the lower curl guide 10 is rotated downward, a space is formed between the lower curl guide 10 and the curl guide cover 24. However, the opening 25 is correspondingly enlarged, and the lower piece 24c of the curl guide cover 24 is opened. Therefore, the opening 25 does not open inside the binding machine body 2. Accordingly, even if the foreign matter 26 such as a small piece of wire gets mixed in when the lower curl guide 10 is opened, it is completely discharged from the opening 25 and does not enter the binding machine body 2.

  As described above, by providing the wall by the curl guide cover 24 and the opening 25 of the lower curl guide 10 in the entry path of the wire piece 26, foreign matters such as the wire piece 26 can be positively discharged.

  Note that the rear end of the opening 25 may be in the vicinity of a portion immediately below the support shaft. Further, the lower piece of the curl guide cover 24 may penetrate the opening 25.

The perspective view which shows the reinforcing bar binding machine which concerns on this invention with an internal mechanism Sectional view around the lower curl guide of the rebar binding machine The perspective view which looked at the part of Drawing 2 from the lower part Sectional view of the curl guide rotated downward The perspective view which looked at the part of Drawing 3 from the upper part

Explanation of symbols

2 Bundling machine body 5 Curl guide 10 Lower curl guide 23 Support shaft 24 Curl guide cover 25 Opening 26 Small wire (foreign matter)

Claims (3)

A curl guide that winds the binding wire sent from the wire reel and feeds it downward, and a lower curl guide that receives the wire and guides it to the upper curl guide again protrudes from the front end of the binding machine body In addition, the base of the lower curl guide is rotatably provided on a support shaft provided at the front part of the binding machine body, and a portion in front of the base of the lower curl guide is disposed in front of the support shaft. In the reinforcing bar binding machine provided to protrude forward from the lower part of the curl guide cover formed in the part,
An reinforcing bar binding machine characterized in that the lower curl guide is formed with an opening that opens at least forward of the curl guide cover, and foreign matter mixed in on the lower curl guide is discharged from the opening.   2. The reinforcing bar binding machine according to claim 1, wherein a rear end of the opening is extended to the vicinity of a portion directly below the support shaft, and a lower portion of the curl guide cover is caused to enter the opening.   The reinforcing bar binding machine according to claim 2, wherein a lower piece portion extending rearward from a lower end portion of the curl guide cover is formed, and the opening portion is filled with the lower piece portion.

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