WO2013091263A1 - 一种具有安全保护装置的切锯 - Google Patents

一种具有安全保护装置的切锯 Download PDF

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Publication number
WO2013091263A1
WO2013091263A1 PCT/CN2011/084989 CN2011084989W WO2013091263A1 WO 2013091263 A1 WO2013091263 A1 WO 2013091263A1 CN 2011084989 W CN2011084989 W CN 2011084989W WO 2013091263 A1 WO2013091263 A1 WO 2013091263A1
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WO
WIPO (PCT)
Prior art keywords
shield
protecting cover
movable
saw blade
support arm
Prior art date
Application number
PCT/CN2011/084989
Other languages
English (en)
French (fr)
Inventor
吴明厅
Original Assignee
上海锐奇工具股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海锐奇工具股份有限公司 filed Critical 上海锐奇工具股份有限公司
Priority to AU2011383563A priority Critical patent/AU2011383563B2/en
Priority to BR112013004762A priority patent/BR112013004762A2/pt
Priority to EP11870511.0A priority patent/EP2754542B1/en
Priority to CN201180065023.5A priority patent/CN103370157B/zh
Priority to US13/816,454 priority patent/US9393659B2/en
Publication of WO2013091263A1 publication Critical patent/WO2013091263A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/06—Safety devices for circular cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7684—With means to support work relative to tool[s]
    • Y10T83/7693—Tool moved relative to work-support during cutting

Definitions

  • the utility model relates to a saw with a safety protection device, which is mainly used for ensuring that the movable shield is not inadvertently turned up during the workpiece feeding and unloading operation, and further protects the operator, and belongs to the technical field of tools. Background technique
  • the basic components of a common saw include: a base for placing the workpiece to be cut, a support arm hinged on the base, a power head mounted on the support arm, and a rotatable saw blade driven by the power head.
  • a power head When the power head is activated to rotate the saw blade, the support arm is pressed down, so that the saw blade can cut the workpiece fixed on the base as needed.
  • the upper and lower halves of the saw blade are respectively covered with a fixed shield and a movable shield.
  • the structure of the movable shield is disclosed in the patent numbers ZL200720043502.8 and US5893311, respectively.
  • the typical structure is that the fan-shaped geometric center of the fan-shaped movable shield forms a rotating pair with the saw blade shaft, and the predetermined position of the cover of the movable shield is hinged with one end of the shield link, and the other end of the shield link is opened There is a straight groove which is consistent with the extending direction of the connecting rod, and the straight groove and the axial position screw near the supporting point of the supporting arm constitute a moving pair.
  • the link mechanism rotates the belt movable cover to gradually overlap the fixed shield to expose the saw blade to cut the workpiece; and when the support arm is lifted
  • the above-mentioned link mechanism loses the strap of the movable shield, gradually resets it, returns to the position where it is engaged with the fixed shield, and completely covers the saw blade, thereby preventing the saw blade from being exposed to accidental injury.
  • the saw blade is a lossy part.
  • the shield link can be lifted up, so that the axial position screw near the hinge point of the support arm is opposite to the inner end of the straight groove of the shield link, so that the movable guard can be turned up. Cover, easy to replace the saw blade.
  • the above-mentioned existing movable shield structure has a one-way restraint function, that is, when the support arm is pressed down, the axial position screw near the hinge support point of the support arm is located at the outer end of the straight groove on the shield link, thus having a forced pull With the action of the movable guard gradually turning up; but the relative displacement of the axial position screw to the inner end of the straight groove is not constrained; therefore, the movable shield always has the possibility of accidental turning up, and there is still a hidden danger. Strictly speaking, it does not meet the requirements of the "Special Requirements for Profile Cutting". The second part of the "Scissors should be designed for workpiece feeding and unloading operations, the movable shield can not be unintentionally turned up".
  • ZL201020281095.6 and ZL201120033928.1 disclose two technical solutions.
  • the technical solution disclosed in ZL201020281095.6 is to constrain the displacement of the shield link by using the positioning pin structure.
  • the structure is as follows:
  • the connecting rod assembly is composed of an extension arm, a support arm, an extension arm link and a connecting rod axial screw.
  • Extension arm assembly On the support arm, one end of the extension arm link with the long groove is connected to the movable shield through the rivet, and the straight groove at the other end is inserted with the link shaft screw and can be rotated around the shaft screw.
  • the positioning pin structure comprises a connecting rod assembly and a groove opened on the fixed shroud, one end of the connecting rod assembly is connected with the supporting arm, and the connecting rod axial screw passes through the shroud connecting rod, the connecting rod assembly and the opening
  • the groove on the fixed shroud connects the three components together and slides through the groove to form a moving pair.
  • the technical solution disclosed in ZL201120033928.1 is to use an additional screw instead of the positioning pin structure in the above technical solution to constrain the displacement of the shield link.
  • the original axial screw is referred to as a first set screw
  • the additional screw is referred to as a second set screw.
  • the structure is: assembling an extension arm on the support arm, the first positioning screw is fixed on the extension arm, the second positioning screw is mounted beside the first positioning screw, and one end of the shield link is close to the rotation center of the movable shield Hinged at the other end, the other end is an arc-shaped advancing elbow that snaps the elbow onto the first set screw.
  • the purpose of the utility model is to provide a cutting saw with a safety protection device, which can ensure that the movable shield is not inadvertently turned up during the workpiece feeding and unloading operation under the premise of ensuring the original performance of the movable shield, thereby further Protect the safety of the operator.
  • the technical solution of the present invention provides a cutting saw having a safety protection device, including a base for placing a workpiece to be cut, the support arm is disposed on the base, and the support arm is connected to the saw blade through the power head.
  • the fan blade is provided with a fan-shaped fixed shield and a movable shield which are rounded and closed, and an extension arm is arranged at the upper end of the support arm, and the extension arm is connected with one end of the shield link through the axial screw, the shield is connected
  • the curved end of the rod has a curved elbow that is coupled to the movable shroud and is snapped over the shaft screw by a sector-shaped fixed shroud, characterized in that the arc of the shroud link allows the end of the elbow to pass through the shaft
  • the screw is connected to the limit button.
  • the lower end of the limit button is provided with a curved bayonet matching the curvature of the arc of the shield link elbow.
  • the utility model has the advantages that the activity of the shield connecting rod is completely locked during the feeding and unloading operation of the workpiece, and the movable protective cover cannot be turned up, thereby eliminating the safety protection device in the past, during which the movable protective cover may still be turned over. As a result, the safety hazard of the accident is caused, and the structure is simple and the assembly is convenient.
  • Figure 1 is a schematic view showing the structure of a cutting state of a saw with a safety protection device
  • FIG. 2 is a partially enlarged schematic view showing a cutting state of a saw with a safety protection device
  • Figure 3 is a schematic view of the structure of the curved buckle
  • Figure 4 is a schematic view showing the structure of a non-cut state of a saw with a safety protection device
  • Figure 5 is a partially enlarged schematic view showing a non-cut state of a saw with a safety protection device
  • FIG. 6 is a schematic structural view of a saw blade with a safety protection device when the saw blade is replaced;
  • Fig. 7 is a partially enlarged schematic view showing a saw blade with a safety protection device when the saw blade is replaced. detailed description
  • the utility model provides a cutting saw with a safety protection device.
  • the cutting saw is mainly arranged by a base 4 for placing a workpiece to be cut, a support arm 9 hinged on the base 4 by an articulated shaft 8, and a placement.
  • the power head on the support arm 9 and the rotatable saw blade 5 are driven by the power head.
  • the extension arm 10 is fixed to the support arm 9, and the upper end of the extension arm is provided with a shaft screw 11.
  • the outer cover of the saw blade 5 has a fan-shaped fixed shield 2 and a movable shield 3 which are substantially rounded after being combined, and the geometric center of the movable shield 3 and the center of rotation of the saw blade, that is, the center of the rotary shaft 6 of the power head form a rotating pair.
  • the cover of the movable shield 3 is hinged to the end of the shield link 7 at a position close to the center of rotation, and the other end of the shield link 7 is formed with an arc-shaped retaining elbow, and the arc-shaped retaining elbow has an arc-shaped groove, such as As shown in FIG.
  • the four parts of the extension arm 10 are passed through the through hole of the extension arm 11, and the four parts of the shield link 7, the movable guard 3, the extension arm 10 and the limit button 13 are connected together through the axial position.
  • the screw 11 is attached to the extension arm 10 to form a rotary pair.
  • the structure of the limit button 13 is as shown in Fig. 3, and the lower end thereof has a curved bayonet 14 which matches the curvature of the arc of the shield connecting rod 7 to make the elbow.
  • the movable shield 3 can be gradually turned up. As shown in Fig. 1, the saw blade 5 is in contact with the workpiece. When the handle 1 is lifted, the movable shield 3 is gradually lowered by the force of the tension spring 12, and as shown in Fig. 4, the saw blade 5 is completely covered by the fixed shield 2 and the movable shield 3. Regardless of the cutting state of FIG. 1 or the lifting state of FIG. 4 when not cutting, the limit button 13 is in the position of FIGS. 2 and 5, and the shield link 7 is restrained by the axial screw 11 and the limit button 13.
  • the rotary motion can only be made around the pivot screw 11 , and the axial position screw 11 is more likely to be stuck by the curved bayonet 14 on the limit button 13 of the limit button 14 due to the curved end of the shield link 7 Sliding in the groove of the shield connecting rod 7, since the curvature of the curved buckle 14 matches the curvature of the curved bending elbow, the stuck state is very stable, and the vibration is not fixed or the screw is not fixed. Loosening causes the pivot screw 11 to slide, and during the process of replacing the cutting workpiece, it is ensured that the movable shield cannot be turned up during the workpiece feeding and unloading operation.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

一种具有安全保护装置的切锯，包括用于放置待切割工件的底座（4），支撑臂（9）设于底座（4）上，支撑臂（9）通过动力头与锯片（5）连接，在锯片（5）上设有对合后为整圆的扇形固定护罩（2）和活动护罩（3），在支撑臂（9）上端设有延伸臂（10），护罩连杆（7）的一端与活动护罩（3）连接，护罩连杆（7）另一端的弧形让位弯头通过轴位螺钉（11）连接限位钮（13）与延伸臂（10）。限位钮（13）的下端设有与护罩连杆（7）的弧形让位弯头的弧度相匹配的弧形卡口（14）。在工件加料、卸料操作期间，能够彻底锁死护罩连杆的活动，保证活动护罩不能翻起，杜绝了以往安全保护装置中活动护罩仍可能翻起而造成事故，同时结构简单、装配方便。

Description

一种具有安全 装置的切锯
技术领域
本实用新型涉及一种具有安全保护装置的切锯， 主要用于确保在工件加料及卸料操作 期间， 活动护罩不被无意翻起， 进一步保护操作人员， 属于工具技术领域。 背景技术
常见切锯的基本组成部分包括：用于放置待切割工件的底座，铰支在底座上的支撑臂， 安置在支撑臂上的动力头以及由动力头驱动可旋转的锯片。 当启动动力头使锯片旋转时， 下压支撑臂， 即可使锯片按需要切割固定在底座上的工件。
为了保证操作安全， 锯片上半部和下半部分别罩有固定护罩和活动护罩。 活动护罩的 结构在专利号为 ZL200720043502.8、 US5893311中分别披露。 其中， 典型的结构为扇形活 动护罩的扇形几何中心与锯片轴形成转动副， 该活动护罩的罩体预定位置与护罩连杆的一 端铰接， 该护罩连杆的另一端附近开有与连杆延伸方向一致的直槽， 该直槽与支撑臂铰支 点附近的轴位螺钉构成移动副。
因此， 在进行切割操作过程中， 当下压支撑臂时， 上述连杆机构将牵带活动护罩转动， 使其逐渐与固定护罩重叠， 露出锯片， 以便切割工件； 而抬起支撑臂时， 上述连杆机构失 去对活动护罩的牵带， 使其逐渐复位， 回复到与固定护罩对合的位置， 将锯片完全罩住， 从而避免锯片外露造成意外伤害。 另外锯片是损耗件， 当需要更换时， 可以将护罩连杆抬 起， 使支撑臂铰支点附近的轴位螺钉相对处于护罩连杆直槽的内端， 从而可以向上翻起活 动护罩， 方便更换锯片。
然而， 正是因为上述现有活动护罩结构具有单向约束作用， 即在下压支撑臂时， 支撑 臂铰支点附近的轴位螺钉位于护罩连杆上直槽的外端， 因此具有强制牵带活动护罩逐渐翻 起的作用； 但对该轴位螺钉相对移位到直槽的内端并无约束； 因此， 活动护罩始终存在意 外翻起的可能性， 依然存在事故隐患。 从严格意义上讲， 不符合 《型材切锯专用要求》 第 二部分中关于 "切锯应设计得工件加料一卸料操作期间， 活动护罩不能被无意翻起" 的要 求。
为解决以上的问题， 专利号为： ZL201020281095.6及 ZL201120033928.1披露了两种 技术方案。 ZL201020281095.6披露的技术方案为利用定位销结构约束护罩连杆的位移。 其 结构为： 由延伸臂、 支撑臂、 延伸臂连杆及连杆轴位螺钉组成连杆组件。 延伸臂装配在支 撑臂上， 开有长形沟槽的延伸臂连杆的一端通过铆钉与活动护罩连接， 另一端的直槽内穿 有连杆轴位螺钉， 并可绕轴位螺钉旋转。 定位销结构包括连杆组件及开在固定护罩上的沟 槽， 连杆组件的一端与所述支撑臂相连， 连杆轴位螺钉穿过所述护罩连杆、 连杆组件及开 在固定护罩上的沟槽将三个部件连接在一起， 通过连杆轴位螺钉在沟槽中滑动形成移动 副。
ZL201120033928.1披露的技术方案为使用额外的一颗螺钉代替上述技术方案中的定 位销结构约束护罩连杆的位移。 在此技术方案中， 原轴位螺钉被称为第一定位螺钉， 额外 的螺钉被称为第二定位螺钉。 其结构为： 在支撑臂上装配延伸臂， 第一定位螺钉固定在延 伸臂上， 第二定位螺钉装在第一定位螺钉旁， 护罩连杆的一端与活动护罩靠近其转动中心 的位置处铰接， 另一端为弧形让位弯头， 该弧形让位弯头卡在第一定位螺钉上。
以上两种技术方案虽然都在一定程度上约束了护罩连杆的位移， 使活动护罩在工件加 料及卸料操作期间被无意翻起的几率降低， 但是在结构上并没有限死护罩连杆， 即护罩连 杆仍有可能滑动使活动护罩在不必要时意外翻起， 因此并没有彻底地消除安全隐患。 发明内容
本实用新型的目的是提供一种具有安全保护装置的切锯， 在保证活动护罩原有性能前 提下， 可以确保在工件加料一卸料操作期间， 活动护罩不被无意翻起， 从而进一步保护操 作人员的安全。
为了达到上述目的， 本实用新型的技术方案提供了一种具有安全保护装置的切锯， 包 括用于放置待切割工件的底座， 支撑臂设于底座上， 在支撑臂通过动力头与锯片连接， 在 锯片上设有对合后为整圆的扇形固定护罩和活动护罩， 在支撑臂上端设有延伸臂， 延伸臂 通过轴位螺钉与护罩连杆的一端连接， 护罩连杆的另一端的弧形让位弯头与活动护罩连 接， 并且穿过扇形固定护罩卡在轴位螺钉上， 其特征在于， 护罩连杆的弧形让位弯头的末 端通过轴位螺钉连接限位钮。 所述的限位钮的下端设有与护罩连杆弧形让位弯头的弧度相 匹配的弧形卡口。
本实用新型的优点在于， 在工件加料卸料操作期间， 彻底锁死护罩连杆的活动， 保证 活动护罩不能翻起， 杜绝了以往安全保护装置， 在此期间， 活动护罩仍可能翻起， 造成事 故的安全隐患， 同时结构简单， 装配方便。 附图说明
图 1是一种具有安全保护装置的切锯的切割状态结构示意图；
图 2是一种具有安全保护装置的切锯的切割状态局部放大示意图；
图 3是弧形卡扣的结构示意图
图 4是一种具有安全保护装置的切锯的非切割状态结构示意图；
图 5是一种具有安全保护装置的切锯的非切割状态局部放大示意图;
图 6是一种具有安全保护装置的切锯更换锯片时的结构示意图；
图 7是一种具有安全保护装置的切锯更换锯片时的局部放大示意图。 具体实施方式
下面结合附图和实施例对本实用新型进一步说明。
本实用新型提供一种具有安全保护装置的切锯， 如图 1所示， 切锯主要由用于放置待 切割工件的底座 4、 通过铰接轴 8铰支在底座 4上的支撑臂 9、 安置在支撑臂 9上的动力 头以及由动力头驱动可旋转的锯片 5组成。支撑臂 9上固定延伸臂 10， 该延伸臂的上端装 有轴位螺钉 11。 锯片 5的外部罩有合成后基本为整圆的扇形固定护罩 2和活动护罩 3， 活 动护罩 3的几何中心与锯片转动中心、 即动力头转轴 6的中心形成转动副。 活动护罩 3罩 体靠近转动中心位置与护罩连杆 7的一端铰接， 护罩连杆 7的另一端制出弧形让位弯头， 弧形让位弯头上有一弧形槽， 如图 2所示， 由轴位螺钉 11穿过延伸臂 10—端的通孔， 把 护罩连杆 7、 活动护罩 3、 延伸臂 10及限位钮 13四个部件连接到一起， 通过轴位螺钉 11 使其连接于延伸臂 10上构成转动副。 限位钮 13的结构如图 3所示， 其下端具有与护罩连 杆 7弧形让位弯头的弧度相匹配的弧形卡口 14。
当手柄 1下压切割时， 由于轴位螺钉 11固定转动， 因此可以牵带活动护罩 3逐渐翻 起， 如图 1所示， 锯片 5与工件接触。 当抬起手柄 1后， 由于拉簧 12的作用力牵带活动 护罩 3逐渐落下， 如图 4所示， 锯片 5被固定护罩 2和活动护罩 3完全罩住。 无论是图 1 的切割状态还是图 4非切割时的抬起状态， 限位钮 13都处于如图 2及图 5的位置， 护罩 连杆 7受到轴位螺钉 11、 限位钮 13的约束， 只能绕轴位螺钉 11做旋转运动， 而轴位螺钉 11更因为护罩连杆 7末端的弧形让位弯头被限位钮的 13上的弧形卡口 14卡死，而无法在 护罩连杆 7的凹槽中滑动， 由于弧形卡扣 14的弧度与弧形让位弯头的弧度相匹配， 因此 卡死的状态非常稳定，不会因为振动或者固定不牢固或者螺钉松动使轴位螺钉 11滑动，在 更换切割工件的过程中， 确保在工件加料一卸料操作期间， 活动护罩不能翻起。 当更换锯片时， 只要先用手轻轻向上拨起限位钮 13 (方向见图 1箭头所示）， 如图 7 所示， 弧形卡口 14 的弧度由于不再和弧形让位弯头的弧度重合， 因此失去对护罩连杆 7 的约束， 轴位螺钉 11此时可以在护罩连杆 7的凹槽中滑动， 如图 6所示， 此时使护罩连 杆 7通过轴位螺钉 11在连杆凹槽中往后滑动至后位， 活动护罩 3即按需翻起， 让出必要 的锯片进出空间以方便锯片的更换。更换完毕后，仅需向下拨回限位钮 13，使其回归原位， 即可再次约束轴位螺钉 11与护罩连杆 Ί的相对划动， 起到保护作用。

Claims

权利要求：
1. 一种具有安全保护装置的切锯， 包括用于放置待切割工件的底座 （4)， 支撑臂 （9)设 于底座 （4) 上， 在支撑臂 （9) 通过动力头与锯片 （5) 连接， 在锯片 （5) 上设有对合后 为整圆的扇形固定护罩 （2 ) 和活动护罩 （3)， 在支撑臂 （9) 上端设有延伸臂 （10)， 延 伸臂 （10) 通过轴位螺钉 （11 ) 与护罩连杆 （7) 的一端连接， 护罩连杆 （7) 另一端的弧 形让位弯头与活动护罩 （3) 连接， 并且穿过扇形固定护罩 （2) 卡在轴位螺钉 （11 ) 上， 其特征在于， 护罩连杆（7) 的弧形让位弯头的末端通过轴位螺钉（11 )连接限位钮（13)。
2. 根据权利要求 1所述的一种具有安全保护装置的切锯，其特征在于，所述的限位钮（13) 的下端设有与护罩连杆 （7) 弧形让位弯头的弧度相匹配的弧形卡口 （14)。
PCT/CN2011/084989 2011-12-19 2011-12-30 一种具有安全保护装置的切锯 WO2013091263A1 (zh)

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AU2011383563A AU2011383563B2 (en) 2011-12-19 2011-12-30 Cutting-off saw with safety protection device
BR112013004762A BR112013004762A2 (pt) 2011-12-19 2011-12-30 serra de corte com dispositivo de proteção de segurança
EP11870511.0A EP2754542B1 (en) 2011-12-19 2011-12-30 Cutting saw with safety protection device
CN201180065023.5A CN103370157B (zh) 2011-12-19 2011-12-30 一种具有安全保护装置的切锯
US13/816,454 US9393659B2 (en) 2011-12-19 2011-12-30 Cutting-off saw with safety protection device

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CN103370157A (zh) 2013-10-23
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AU2011383563B2 (en) 2014-10-02
BR112013004762A2 (pt) 2017-10-31
AU2011383563A1 (en) 2013-07-18
EP2754542A1 (en) 2014-07-16
CN202411535U (zh) 2012-09-05
US9393659B2 (en) 2016-07-19
EP2754542A4 (en) 2014-07-16
US20140216227A1 (en) 2014-08-07
CL2013000326A1 (es) 2013-10-25

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