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MarketScreener Homepage  >  Equities  >  Tokyo  >  MURO CORPORATION    7264   JP3914700004

MURO CORPORATION

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Japan - Patent Issued for Continuous Screw Tightening Machine With Washer Stacking Supply Mechanism (USPTO 10,364,574): Muro Corporation

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08/14/2019 | 05:10pm EDT

2019 AUG 14 (NewsRx) -- By a News Reporter-Staff News Editor at Daily Asia Business -- According to news reporting originating from Alexandria, Virginia, by NewsRx journalists, a patent by the inventors Arai, Kunihiro (Utsunomiya, Japan); Watanabe, Yoichi (Utsunomiya, Japan), filed on July 28, 2015, was published online on August 12, 2019.

The assignee for this patent, patent number 10,364,574, is Muro Corporation (Tokyo, Japan).

Reporters obtained the following quote from the background information supplied by the inventors: “Field of the Invention

“The present invention relates to a continuous screw tightening machine with washer stacking supply mechanism and particularly to a continuous screw tightening machine with washer stacking supply mechanism constituted such that, in a state in which a screw penetrates a hole of a washer, the screw and washer can be tightened and fixed at tightening target spots at the same time.

“Description of the Related Art

“When roofing or the like, for example, the screws and washers need to be tightened at target spots of a roofing member in the state in which the screw penetrates the hole of the washer.

“As a continuous screw tightening machine with washer stacking supply mechanism in such fields, a washer distribution fastener screwing machine disclosed in Japanese Patent Laid-Open No. 7-76911 is known.

“This washer distribution fastener screwing machine (that is, a screw tightening machine) is constituted so as to individually distribute washers from a similar roofing washer stack capable of being stacked.

“That is, this washer distribution fastener screwing machine is constituted to include a base, a shuttle, an elongated stop, a gate and a claw and supplies washers one by one to the shuttle from a lower outlet of the base, and the washer received at the shuttle passes through the gate and is transferred to a predetermined position, and when the shuttle moves in order to receive a subsequent washer again, the previous washer is pressed by the claw so as not to move, and then, the screw is screwed into a center hole of the previous washer by the screwing machine on the base and screwed and fixed at a target spot.

“However, in the case of the washer distribution fastener screwing machine in Japanese Patent Laid-Open No. 7-76911, since an entire dimension is large and its weight is also large, a work speed is low and though the washers are stacked at a preparation position, the screw needs to be supplied one by one, which is cumbersome. Moreover, since both the screw and washer at a fastening preparation position cannot be seen from an outside, prevention of defective fastening is difficult. Furthermore, since the screws are supplied manually one by one, usability is poor, and since the washer is pressurized by a weight in some cases, there are problems such as possibility of drop of the washer during transportation.

“The problem to be solved by the present invention is that, there is no continuous screw tightening machine with washer stacking supply mechanism which, in a state in which a screw penetrates a hole of a washer, can tighten and fix the screw and washer at a tightening target spot at the same time, continuously and automatically supply the screws and washers required for a tightening work in order and moreover, realize stable supply of the washers one by one and prevent blank striking or double striking of the washer.”

In addition to obtaining background information on this patent, NewsRx editors also obtained the inventors’ summary information for this patent: “A continuous screw tightening machine with washer stacking supply mechanism according to the present invention has a major characteristic in having a tightening machine body on which a driving machine is mounted, connecting a bit for screw tightening rotated/driven by the driving machine detachably and rotatably and arranged capable of advancing/retreating between a standby position and a tightening possible position by the bit, a tip-end block provided below the tightening machine body, provided with a washer temporary accommodating portion for accommodating one washer capable of being withdrawn downward, and arranged on a tightening target spot, a screw-and-washer supply mechanism body arranged between the tightening machine body and the tip-end block, having an accommodating region for stacking a large number of the washers in stacked arrangement on a rear side and capable of concentric arrangement of screws between the bit and the washer, a washer sequential supply mechanism incorporated in the accommodating region of the screw-and-washer supply mechanism body from a side portion to a lower part and provided with a washer feeding body for engaging a concave portion corresponding to an outer shape of the washer with an outer periphery of the washer and feeding it to the washer temporary accommodating portion, a screw rope magazine accommodating a screw rope to which a large number of the screws are connected by a band-shaped member at a constant interval capable of being fed out and detachably arranged on a rear part side of the screw-and-washer supply mechanism body, and a screw sequential supply mechanism incorporated in the screw-and-washer supply mechanism body, in which, in conjunction with retreating of the tightening machine body, the washer is automatically supplied to the washer temporary accommodating portion by the washer sequential supply mechanism, one of the screws connected to the screw rope from the screw rope magazine is automatically supplied by the screw sequential supply mechanism so as to be concentrically arranged between the washer and the bit, in conjunction with advancing of the tightening machine body, the washer sequential supply mechanism is automatically set to a feeding preparation attitude for the subsequent washer, and the screw sequential supply mechanism is automatically set to a feeding preparation attitude for the subsequent screw.

“According to the invention described in claim 1, the continuous screw tightening machine with washer stacking supply mechanism is constituted such that, in conjunction with the retreating of the tightening machine body, the washer is supplied to the washer temporary accommodating portion by the washer feeding body of the washer sequential supply mechanism, the one screw connected to the screw rope from the screw rope magazine is supplied by the screw sequential supply mechanism so as to be arranged concentrically between the washer and the bit, and in conjunction with the advancing and the tightening operation of the tightening machine body, the washer sequential supply mechanism is set to the feeding preparation attitude for the subsequent washer, and the screw sequential supply mechanism is set to the feeding preparation attitude for the subsequent screw and thus, the continuous screw tightening machine with washer stacking supply mechanism capable of sequentially and continuously performing the screw and washer tightening operation efficiently can be realized and provided.

“According to the present invention described in claim 2, the washers are stacked and stored in the accommodating region inside the screw-and-washer supply mechanism body and major parts of the screw sequential supply mechanism and the washer sequential supply mechanism are stored in the screw-and-washer supply mechanism body and thus, there is substantially no member expanding outward obstructing the screw-and-washer supply mechanism body, the machine can be made compact and light-weighted as a whole, and the continuous screw tightening machine with washer stacking supply mechanism which can greatly contribute to improvement of a working speed can be realized and provided.

“According to a further feature of the present invention, the washer temporary accommodating portion provided with a movable latch portion regulating movement of the washer loaded in a tip-end block in a direction opposite to the feeding direction is provided, and a seat surface portion provided with an arc-shaped contact portion corresponding to an outer shape of the washer and on which the washer is placed is provided in the washer feeding body and thus, feeding of the washers to the washer temporary accommodating portion by the washer feeding body can be performed reliably one by one and therefore, the continuous screw tightening machine with washer stacking supply mechanism which can prevent washer clogging caused by double feeding or the like and moreover, can also prevent washer blank tightening or washer double tightening can be realized and provided.

“According to a yet further feature of the present invention, the washer feeding body is constituted by including a return claw covering a part of an outer peripheral upper surface of the washer on the seat surface portion and thus, the continuous screw tightening machine with washer stacking supply mechanism which can perform feeding of the washer to the washer temporary accommodating portion by the washer feeding body one by one more stably and reliably can be realized and provided.

“According to still another feature of the present invention since a single a feeding of the washer is performed not by the tightening machine body but by a manual operation of a single operation lever interlocking with the washer sequential supply mechanism, the washer single body can be set to a tightening possible position after only the washers are emptied first, and the continuous screw tightening machine with washer stacking supply mechanism which exerts an effect that only the washer can be fed when the screw and the washer are loaded can be realized and provided.

“A still further feature according to the invention, is an effect exerted similar to that of the invention described in claim 2, and since the screw-and-washer supply mechanism body includes a lid body opening/closing a side surface of the accommodating region of the large number of washers in the stacked arrangement and a washer pressing piece for pressing an uppermost part of the large number of washers in the stacked arrangement, the continuous screw tightening machine with washer stacking supply mechanism which can be set in the accommodating region simply and easily and has no concern of a drop of the washer can be realized and provided.”

The claims supplied by the inventors are:

“What is claimed is:

“1. A continuous screw tightening machine with washer stacking supply mechanism comprising: a tightening machine body on which a driving machine is mounted and connecting a bit for screw tightening rotated/driven by the driving machine detachably and rotatably, a tightening machine body guide mechanism advancing/retreating the tightening machine body between a standby position and an advanced position where the bit is advanced so as to be arranged at a position capable of tightening a screw, a tip-end block provided below the tightening machine body guide mechanism and provided with a washer temporary accommodating portion for accommodating one washer having a hole through which the screw is inserted, capable of being withdrawn downward and a base plate capable of placing a large number of the washers in stacked arrangement, and arranged on a tightening target spot, a screw-and-washer supply mechanism body arranged between the tightening machine body guide mechanism and the tip-end block and having an accommodating region for a large number of the washers in stacked arrangement on a rear side, a washer sequential supply mechanism interlocked with the tightening machine body and incorporated in the accommodating region of the screw-and-washer supply mechanism body from a side portion to a lower part and for automatically supplying the washer on a lowermost stage in a large number of the washers stacked on the base plate and accommodated in the screw-and-washer supply mechanism body to the washer temporary accommodating portion in conjunction with retreating of the tightening machine body to the standby position by sliding it on the base plate of the tip-end block by a washer feeding body provided with a concave portion corresponding to an outer shape of the washer and automatically returning the washer feeding body in conjunction with advancing of the tightening machine body to an advanced position to a supply preparation position of the subsequent one washer, a screw rope magazine accommodating a screw rope to which a large number of the screws are connected at a constant interval by a band-shaped member, capable of being fed out and detachably arranged on a rear part side of the screw-and-washer supply mechanism body, and a screw sequential supply mechanism interlocked with the tightening machine body and incorporated in the screw-and-washer supply mechanism body and in conjunction with advancing of the tightening machine body to a position capable of tightening the bit, automatically moving a feeding claw for feeding each screw of the screw rope supplied from the screw rope magazine to a supply preparation position of the one screw connected to the screw rope and in conjunction with retreating of the tightening machine body to the standby position, automatically supplying the screw in order by the feeding claw so as to be in concentric arrangement between a tip end of the bit and a hole of the washer, wherein rotation/driving of the bit advanced to the tightening possible position by the driving machine, removes the screw downward from the washer temporary accommodating portion such that the screw together with the washer is tightened and fixed teat the tightening target spot.

“2. The continuous screw tightening machine with washer stacking supply mechanism according to claim 1, wherein the screw-and-washer supply mechanism body includes a lid body opening/closing a side surface of the accommodating region of a large number of the washers in the stacked arrangement, a pair of guide rods mounted in fixed arrangement to perpendicular arrangement on an outer side of the lid body, a moving box body provided with a knob supported by the pair of guide rods, capable of vertical movement, and a washer pressing piece mounted on the moving box body for pressing an uppermost part of a large number of the washers in stacked arrangement.

“3. A continuous screw tightening machine with washer stacking supply mechanism comprising: a tightening machine body on which a driving machine is mounted, connecting a bit for screw tightening rotated/driven by the driving machine detachably and rotatably and arranged capable of advancing/retreating between a standby position and a tightening possible position by the bit, a tip-end block provided below the tightening machine body, provided with a washer temporary accommodating portion for accommodating one washer capable of being withdrawn downward, and arranged on a tightening target spot, a screw-and-washer supply mechanism body arranged between the tightening machine body and the tip-end block, having an accommodating region for stacking a large number of the washers in stacked arrangement on a rear side and capable of concentric arrangement of screws between the bit and the washer, a washer sequential supply mechanism incorporated in the accommodating region of the screw-and-washer supply mechanism body from a side portion to a lower part and provided with a washer feeding body for engaging a concave portion corresponding to an outer shape of the washer with an outer periphery of the washer and feeding it to the washer temporary accommodating portion, a screw rope magazine accommodating a screw rope to which a large number of the screws are connected at a constant interval by a band-shaped member, capable of being fed out and detachably arranged on a rear part side of the screw-and-washer supply mechanism body, and a screw sequential supply mechanism incorporated in the screw-and-washer supply mechanism body, wherein in conjunction with retreating of the tightening machine body, the washer is automatically supplied to the washer temporary accommodating portion by the washer sequential supply mechanism, one of the screws connected to the screw rope from the screw rope magazine is automatically supplied by the screw sequential supply mechanism so as to be concentrically arranged between the washer and the bit, in conjunction with advancing of the tightening machine body, the washer sequential supply mechanism is automatically set to a feeding preparation attitude for the subsequent washer, and the screw sequential supply mechanism is automatically set to a feeding preparation attitude for the subsequent screws wherein the screw-and-washer supply mechanism body includes a lid body opening/closing a side surface of the accommodating region of a large number of the washers in the stacked arrangement, a pair of guide rods mounted in fixed arrangement to perpendicular arrangement on an outer side of the lid body, a moving box body provided with a knob supported by the pair of guide rods, capable of vertical movement, and a washer pressing piece mounted on the moving box body for pressing an uppermost part of a large number of the washers in stacked arrangement.”

For more information, see this patent: Arai, Kunihiro; Watanabe, Yoichi. Continuous Screw Tightening Machine With Washer Stacking Supply Mechanism. U.S. Patent Number 10,364,574, filed July 28, 2015, and published online on August 12, 2019. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10,364,574.PN.&OS=PN/10,364,574RS=PN/10,364,574

(Our reports deliver fact-based news of research and discoveries from around the world.)

Copyright © 2019 NewsRx LLC, Daily Asia Business, source Geographic Newsletters

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