JP2010163277A

JP2010163277A - Clamp

Info

Publication number: JP2010163277A
Application number: JP2009009238A
Authority: JP
Inventors: Shusaku Tsuda; 修作津田; Haruo Kubota; 治男久保田
Original assignee: Elephant Chain Block Co Ltd
Current assignee: Elephant Chain Block Co Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2010-07-29

Abstract

PROBLEM TO BE SOLVED: To provide a clamp allowing a worker to securely confirm that an object to be clamped as a suspension load is nipped and held by a sufficient force. SOLUTION: The object 2 to be clamped is nipped and held by first and second receiving parts 23, 31 connected with a pair of legs 16, 17 of a clamp body 3, respectively. The clamp is also provided with a third member 6 connected with a second member 5 to transmit torque having a predetermined value or smaller and a first hitting mechanism 11. The first hitting mechanism 11 includes a hit first part provided in the second member 5 and a first hitting part provided in the third member 6. When the torque to be transmitted between the second member 5 and the third member 6 exceeds the predetermined value and the third member 6 rotates relatively to the second member 5, the first hitting part hits the first hit part. COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、クランプに関する。 The present invention relates to a clamp.

クレーンなどを用いて吊り荷を吊り上げるときに、吊り荷を挟持するクランプを用いることがある（たとえば、特許文献１，２参照）。
特許文献１のクランプは、Ｕ字状をなすクランプ本体の１対の脚部の一方に装着される回転顎と、１対の脚部の他方を貫通する装着孔に装着される筒状のプレッシャナットと、プレッシャナットの内周に形成された雌ネジに螺合された締付ボルトとを含んでいる。これら回転顎と締付ボルトとで吊り荷を締め付けて挟持するようになっており、締付ボルトが吊り荷を締付ける締付力が所定値を超えると、プレッシャナットに設けられた締付確認リングがクランプ本体に対して隠れるようになっている。これにより、締付力が所定値を超えたことを作業者が目視確認できるようになっており、締付力不足が生じないようにしてある。 When lifting a suspended load using a crane or the like, a clamp that holds the suspended load may be used (for example, see Patent Documents 1 and 2).
The clamp of patent document 1 is a cylindrical pressure attached to a rotating jaw attached to one of a pair of leg portions of a U-shaped clamp body and an attachment hole penetrating the other of the pair of leg portions. The nut includes a nut and a tightening bolt screwed into a female screw formed on the inner periphery of the pressure nut. These rotating jaws and tightening bolts clamp the suspended load, and when the tightening force with which the tightening bolt tightens the suspended load exceeds a predetermined value, a tightening confirmation ring provided on the pressure nut Is hidden from the clamp body. As a result, the operator can visually confirm that the tightening force exceeds a predetermined value, so that insufficient tightening force does not occur.

また、特許文献２のクランプは、一方の脚部に取り付けられる受け金およびソケットと、他方の脚部に螺着された締付ボルトとで吊り荷を挟持できるようになっている。受け金およびソケットは、皿バネによって締付ボルト側に付勢されている。受け金と締付ボルトとの間の軸力（吊り荷を締め付ける締付力）により、受け金およびソケットは一方の脚部に埋没するように所定量だけ移動するようになっている。これにより、ソケットに装着された締付確認リングが一方の脚部内に隠れ、吊り荷を締め付ける締付力が所定値以上になったことを目視確認することができる。 Moreover, the clamp of patent document 2 can clamp a suspended load with the receiving metal and socket attached to one leg part, and the clamping bolt screwed by the other leg part. The receiver and the socket are urged toward the tightening bolt by a disc spring. Due to the axial force (clamping force for tightening the suspended load) between the receiver and the clamping bolt, the receiver and the socket are moved by a predetermined amount so as to be buried in one leg. As a result, it is possible to visually confirm that the tightening confirmation ring mounted on the socket is hidden in one leg and the tightening force for tightening the suspended load is equal to or greater than a predetermined value.

特開平１０−３７９１９号公報JP-A-10-37919 特開２００７−６９３１３号公報JP 2007-69313 A

クランプを繰り返し使用することなどにより、クランプに埃や油などの汚れが付着すると、締付確認リングが見え難くなってしまい、締付確認リングを確認し難くなってしまう。また、クランプを見る向きによっては、締付確認リングが吊り荷などに隠れてしまい、締付確認リングを目視確認し難い場合がある。その結果、吊り荷が所定の締付力以上で挟持されていることを確認し難い。 If dirt such as dust or oil adheres to the clamp due to repeated use of the clamp, it becomes difficult to see the tightening confirmation ring and it is difficult to confirm the tightening confirmation ring. Further, depending on the direction in which the clamp is viewed, the tightening confirmation ring may be hidden behind a suspended load or the like, making it difficult to visually confirm the tightening confirmation ring. As a result, it is difficult to confirm that the suspended load is clamped with a predetermined tightening force or more.

本発明は、このような事情に鑑みてなされたもので、その目的とするところは、吊り荷としてのクランプ対象物が十分な力で挟持されていることをより確実に確認することのできるクランプを提供することにある。 The present invention has been made in view of such circumstances, and the purpose of the present invention is to provide a clamp capable of more reliably confirming that a clamp object as a suspended load is clamped with sufficient force. Is to provide.

上記目的を達成するために、請求項１に記載の発明は、クランプであって、隙間を空けて互いに対向する１対の脚部を含むクランプ本体と、前記１対の脚部の一方に連結されクランプ対象物を受ける第１受け部を含む第１部材と、前記１対の脚部の他方に形成された雌ねじ部に螺合する雄ねじ部、および前記雄ねじ部に連結され前記第１受け部と協働して前記クランプ対象物を挟む第２受け部を含む第２部材と、前記雄ねじ部とは所定値以下のトルクを伝達可能に連結され、前記雄ねじ部を前記雌ねじ部に対して回転させるための第３部材と、前記第２部材に設けられた被打撃部および前記第３部材に設けられた打撃部を含み、前記第２部材と前記第３部材との間で伝達されるトルクが前記所定値を超えて前記第３部材が前記第２部材に対して相対回転したときに、前記打撃部が前記被打撃部を打撃する打撃機構と、を備えることを特徴としている。 In order to achieve the above-mentioned object, the invention according to claim 1 is a clamp, comprising a clamp body including a pair of legs facing each other with a gap therebetween, and connected to one of the pair of legs. A first member including a first receiving portion that receives the object to be clamped, a male screw portion that is screwed into a female screw portion formed on the other of the pair of legs, and the first receiving portion that is connected to the male screw portion. The second member including the second receiving portion that sandwiches the clamp object in cooperation with the male screw portion is connected to be able to transmit a torque of a predetermined value or less, and the male screw portion is rotated with respect to the female screw portion. Torque transmitted between the second member and the third member, including a third member for causing the second member, a hit portion provided in the second member, and a hit portion provided in the third member Exceeds the predetermined value and the third member is against the second member. When relative rotation, wherein the hitting portion is characterized by and a striking mechanism for striking said struck portion.

このような構成によると、第３部材を回転させることにより、第２部材の雄ねじ部をクランプ本体の雌ねじ部に対して回転させて第２部材を第１部材側に進めることができる。そして、第１受け部および第２受け部でクランプ対象物を挟持した状態で、第３部材から第２部材に伝わるトルクが所定値に達し、十分な挟持力でクランプ対象物を挟持できるようになったとき、第３部材が第２部材に対して相対回転することで、打撃部が被打撃部を打撃する。このときの振動と音により、十分な挟持力でクランプ対象物を挟持していることを確認できるので、目視確認が不要であり、クランプに汚れが付着しているときや、クランプが見えないときでも、十分な挟持力でクランプ対象物を挟持できていることを確実に確認できる。 According to such a configuration, by rotating the third member, the second member can be advanced toward the first member by rotating the male screw portion of the second member relative to the female screw portion of the clamp body. The torque transmitted from the third member to the second member reaches a predetermined value in a state in which the clamp target is clamped between the first receiver and the second receiver, so that the clamp target can be clamped with sufficient clamping force. When this happens, the third member rotates relative to the second member, so that the hitting portion hits the hit portion. Because the vibration and sound at this time can confirm that the clamp target is clamped with sufficient clamping force, visual confirmation is unnecessary, and when the clamp is dirty or the clamp is not visible However, it can be reliably confirmed that the clamping object can be clamped with a sufficient clamping force.

請求項２に記載の発明は、請求項１に記載の発明において、前記打撃部を前記被打撃部側に弾性的に付勢する付勢機構と、前記第３部材の一端面に形成された第１カム、および前記第２部材のうち前記第３部材の前記一端面に対向する一端面に形成された第２カムを含み、前記第２部材に対する前記第３部材の相対回転角が相対的に少ないときに、前記第１カムと前記第２カムとの係合により前記打撃部と前記被打撃部とを前記雄ねじ部の軸方向において離隔させるカム機構と、をさらに備え、前記相対回転角が相対的に多くなったときに、前記第１カムおよび第２カムの係合が解除され前記打撃部が前記被打撃部を打撃することを特徴としている。 According to a second aspect of the present invention, in the first aspect of the present invention, an urging mechanism that elastically urges the hitting portion toward the hit portion and an end surface of the third member are formed. A first cam and a second cam formed on one end surface of the second member facing the one end surface of the third member, wherein the relative rotation angle of the third member relative to the second member is relatively A cam mechanism that separates the hitting portion and the hit portion from each other in the axial direction of the male screw portion when the first cam and the second cam are engaged with each other. When is relatively increased, the engagement of the first cam and the second cam is released, and the hitting portion hits the hit portion.

このような構成によると、第３部材が第２部材に対して相対回転し始めると、第１カムと第２カムとの係合により打撃部と被打撃部とが雄ねじの軸方向において離隔し、第３部材がさらに相対回転すると、両カムの係合が解除される。このとき、付勢機構の付勢力によって打撃部が被打撃部に勢いよく打撃されるので、打撃による振動と音を十分に生じることができ、十分な挟持力でクランプ対象物を挟持できていることをより確実に確認できる。 According to such a configuration, when the third member starts to rotate relative to the second member, the hitting portion and the hit portion are separated in the axial direction of the male screw by the engagement of the first cam and the second cam. When the third member further rotates, the engagement of both cams is released. At this time, since the striking part is struck by the hit part vigorously by the urging force of the urging mechanism, vibration and sound due to the striking can be sufficiently generated, and the clamping object can be clamped with a sufficient clamping force. This can be confirmed more reliably.

請求項３に記載の発明は、請求項２に記載の発明において、前記第１カムは、前記第２部材に対する前記第３部材の相対回転方向の上流側に向かうに従い、前記第３部材の前記一端面からの前記軸方向における突出量が多くされた第１傾斜面と、前記第１傾斜面に対して前記相対回転方向の上流側に配置された第１絶壁とを含み、前記第２カムは、前記相対回転方向の下流側に向かうに従い、前記第２部材の前記一端面からの前記軸方向における突出量が多くされた第２傾斜面と、前記第２傾斜面に対して前記相対回転方向の下流側に配置された第２絶壁とを含むことを特徴としている。 According to a third aspect of the present invention, in the second aspect of the present invention, the first cam moves toward the upstream side in the relative rotation direction of the third member with respect to the second member, and A first inclined surface having an increased amount of protrusion in the axial direction from one end surface; and a first steep wall disposed upstream of the first inclined surface in the relative rotational direction, and the second cam Is a second inclined surface in which the amount of protrusion in the axial direction from the one end surface of the second member is increased toward the downstream side in the relative rotation direction, and the relative rotation with respect to the second inclined surface. And a second precipice disposed downstream in the direction.

このような構成によると、第３部材が第２部材に対して相対回転することにより、第１傾斜面と第２傾斜面とが係合し、第３部材に設けられた打撃部が、第２部材に設けられた被打撃部に対して、雄ねじの軸方向において離隔する。そして、第３部材がさらに相対回転すると、第１絶壁が第２絶壁を乗り越えて、第１および第２傾斜面同士の係合が一気に解除されるので、打撃部を被打撃部に勢いよく打つことができる。 According to such a configuration, when the third member rotates relative to the second member, the first inclined surface and the second inclined surface are engaged, and the striking portion provided on the third member is It separates in the axial direction of a male screw with respect to the hit | damage part provided in 2 members. Then, when the third member further rotates relative to each other, the first precipice crosses over the second precipice, and the engagement between the first and second inclined surfaces is released at a stretch, so that the striking portion is hit against the hit portion vigorously. be able to.

請求項４に記載の発明は、請求項３に記載の発明において、前記打撃部は、前記第１カムの先端部を含み、前記被打撃部は、前記第２部材の前記一端面において前記第２絶壁に隣接して配置されていることを特徴としている。
このような構成によると、第１カムの先端部を打撃部として用いている。カム機構の第１カムを打撃機構に兼用することができ、簡易な構成で打撃機構を構成できる。 According to a fourth aspect of the present invention, in the third aspect of the present invention, the hitting portion includes a tip end portion of the first cam, and the hit target portion is formed on the first end surface of the second member. 2 It is characterized by being arranged adjacent to the precipice.
According to such a structure, the front-end | tip part of a 1st cam is used as a striking part. The first cam of the cam mechanism can also be used as the striking mechanism, and the striking mechanism can be configured with a simple configuration.

請求項５に記載の発明は、請求項３または４に記載の発明において、前記打撃部は、前記第３部材の前記一端面において前記第１絶壁に隣接して配置され、前記被打撃部は、前記第２カムの先端部を含むことを特徴としている。
このような構成によると、第２カムの先端部を被打撃部として用いている。カム機構の第２カムを打撃機構に兼用することができ、より簡易な構成で打撃機構を構成できる。 The invention according to claim 5 is the invention according to claim 3 or 4, wherein the hitting portion is disposed adjacent to the first cliff on the one end face of the third member, and the hit portion is The tip of the second cam is included.
According to such a configuration, the tip portion of the second cam is used as the hit portion. The second cam of the cam mechanism can also be used as the striking mechanism, and the striking mechanism can be configured with a simpler configuration.

以上述べたように、請求項１記載の発明によれば、打撃部が被打撃部を打撃する。このときの振動と音により、十分な挟持力でクランプ対象物を挟持できていることを確認できるので、目視確認が不要であり、クランプに汚れが付着しているときや、クランプが見えないときでも、十分な挟持力でクランプ対象物を挟持できていることを確実に確認できる。 As described above, according to the first aspect of the present invention, the hitting part hits the hit part. The vibration and sound at this time can confirm that the clamping object can be clamped with sufficient clamping force, so visual confirmation is unnecessary, and when the clamp is dirty or the clamp is not visible However, it can be reliably confirmed that the clamping object can be clamped with a sufficient clamping force.

請求項２に記載の発明によれば、付勢機構の付勢力によって打撃部が被打撃部に勢いよく打撃されるので、打撃による振動と音を十分に生じることができ、十分な挟持力でクランプ対象物を挟持できていることをより確実に確認できる。
請求項３に記載の発明によれば、打撃部を被打撃部に勢いよく打つことができる。
請求項４に記載の発明によれば、簡易な構成で打撃機構を構成できる。 According to the second aspect of the present invention, since the striking portion is struck by the hit portion by the urging force of the urging mechanism, vibration and sound due to the striking can be sufficiently generated, and with sufficient clamping force It can confirm more reliably that the clamp target object can be clamped.
According to invention of Claim 3, a hit | damage part can be struck to a hit | damaged part vigorously.
According to invention of Claim 4, a striking mechanism can be comprised with a simple structure.

請求項５に記載の発明によれば、より簡易な構成で打撃機構を構成できる。 According to the fifth aspect of the present invention, the striking mechanism can be configured with a simpler configuration.

本発明の一実施形態にかかるクランプの概略構成を一部断面で示す側面図である。It is a side view which shows the schematic structure of the clamp concerning one Embodiment of this invention in a partial cross section. （ａ）は、第２部材の主軸の一端面および第３部材の周辺の断面図であり、（ｂ）は、図２（ａ）のＩＩａ−ＩＩａ線に沿う断面図である。(A) is sectional drawing of the one end surface of the main axis | shaft of a 2nd member, and the periphery of a 3rd member, (b) is sectional drawing which follows the IIa-IIa line | wire of Fig.2 (a). 第２部材および第３部材の要部の斜視図である。It is a perspective view of the principal part of the 2nd member and the 3rd member. 図２（ａ）のＩＶ−ＩＶ線に沿う断面図である。It is sectional drawing which follows the IV-IV line of Fig.2 (a). （ａ）および（ｂ）は、それぞれ、クランプにクランプ対象物を挟持させるときの手順を説明するための一部断面側面図である。(A) And (b) is a partial cross section side view for demonstrating the procedure when each clamp object is clamped by a clamp, respectively. （ａ）は、第１カムが第２カムに対して滑るときの様子を説明するための要部の断面図であり、（ｂ）は、図６（ａ）のＶＩｂ−ＶＩｂ線に沿う断面図である。(A) is sectional drawing of the principal part for demonstrating a mode when a 1st cam slides with respect to a 2nd cam, (b) is a cross section in alignment with the VIb-VIb line | wire of Fig.6 (a). FIG. 第１カムと第２カムの係合が解除された様子を示す要部の断面図である。It is sectional drawing of the principal part which shows a mode that engagement of the 1st cam and the 2nd cam was cancelled | released. 第２部材を緩めるときの様子を説明するための要部の断面図である。It is sectional drawing of the principal part for demonstrating a mode when loosening a 2nd member.

本発明の好ましい実施形態を添付図面を参照しつつ説明する。
図１は、本発明の一実施形態にかかるクランプの概略構成を一部断面で示す側面図である。図１を参照して、クランプ１は、鋼材などのクランプ対象物２を挟持して持ち上げるためのものである。
このクランプ１は、クランプ本体３と、第１部材４と、第２部材５と、第３部材６と、付勢機構７と、スリーブ８と、端部材９と、カム機構１０と、第１打撃機構１１および第２打撃機構１２と、を備えている。なお、図１を参照して説明するときは、クランプ１を図１のように側面視した状態を基準に説明する。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view showing a schematic configuration of a clamp according to an embodiment of the present invention in a partial cross section. Referring to FIG. 1, a clamp 1 is for clamping and lifting a clamp object 2 such as a steel material.
The clamp 1 includes a clamp body 3, a first member 4, a second member 5, a third member 6, a biasing mechanism 7, a sleeve 8, an end member 9, a cam mechanism 10, and a first member. A striking mechanism 11 and a second striking mechanism 12 are provided. In addition, when it demonstrates with reference to FIG. 1, it demonstrates based on the state which looked at the clamp 1 sidely like FIG.

クランプ本体３は、鍛造などにより形成されており、所定の厚み（図１の紙面と直交する方向の長さ）を有している。このクランプ本体３は、略Ｕ字状のベース１３と、ベース１３とは一体に形成された第１吊り部１４および第２吊り部１５とを含んでいる。
ベース１３は、互いに隙間をあけて対向し略平行に延びる１対の脚部１６，１７と、これら１対の脚部１６，１７を接続する接続部１８とを含んでいる。 The clamp body 3 is formed by forging or the like, and has a predetermined thickness (a length in a direction perpendicular to the paper surface of FIG. 1). The clamp body 3 includes a substantially U-shaped base 13, and a first suspending portion 14 and a second suspending portion 15 that are integrally formed with the base 13.
The base 13 includes a pair of leg portions 16 and 17 that face each other with a gap therebetween and extend substantially in parallel, and a connection portion 18 that connects the pair of leg portions 16 and 17.

接続部１８は、左右（略水平）に細長い板状に形成されており、側面視において、略矩形状をしている。接続部１８のうち、後述する受入空間１９に臨む内側面１８ａとは反対を向く外側面１８ｂに、第１吊り部１４が設けられている。第１吊り部１４は、側面視において略三角形形状をしており、外側面１８ｂから遠ざかるに従い先細りになっている。この第１吊り部１４の頂部１４ａ付近に、第１吊り孔１４ｂが貫通形成されている。第１吊り孔１４ｂには、クレーンのフック（図示せず）などを引っ掛けることができる。 The connecting portion 18 is formed in a plate shape that is elongated to the left and right (substantially horizontal), and has a substantially rectangular shape in a side view. The 1st suspension part 14 is provided in the outer surface 18b which faces the other side 18a which faces the receiving space 19 mentioned later among the connection parts 18. As shown in FIG. The first suspending portion 14 has a substantially triangular shape in a side view, and tapers as the distance from the outer surface 18b increases. A first suspension hole 14 b is formed in the vicinity of the top portion 14 a of the first suspension portion 14. A crane hook (not shown) or the like can be hooked on the first suspension hole 14b.

１対の脚部１６，１７は、接続部１８の長手方向の両端から延びる板状に形成されており、接続部１８から下方に向けて延びている。接続部１８および１対の脚部１６，１７によって、クランプ対象物２を受け入れるための受入空間１９が区画されている。
一方の脚部１６は、接続部１８の左端に固定されている。一方の脚部１６のうち、受入空間１９に臨む内側面１６ａには、第１部材４を収容するための凹状の第１収容孔１６ｃが形成されている。一方の脚部１６のうち、内側面１６ａとは反対を向く外側面１６ｂに第２吊り部１５が設けられている。第２吊り部１５は、側面視において略湾曲三角形形状をしており、外側面１６ｂから遠ざかるに従い先細りになっている。この第２吊り部１５に、第２吊り孔１５ｂが貫通形成されている。第２吊り孔１５ｂには、クレーンのフック（図示せず）などを引っ掛けることができる。なお、吊り方に応じて、適宜、第１吊り孔１４ｂまたは第２吊り孔１５ｂが使用される。 The pair of leg portions 16 and 17 are formed in a plate shape extending from both ends in the longitudinal direction of the connection portion 18, and extend downward from the connection portion 18. A receiving space 19 for receiving the clamping object 2 is defined by the connecting portion 18 and the pair of leg portions 16 and 17.
One leg portion 16 is fixed to the left end of the connecting portion 18. A concave first accommodation hole 16 c for accommodating the first member 4 is formed on the inner side surface 16 a facing the receiving space 19 in one leg portion 16. The second suspension portion 15 is provided on the outer surface 16b of the one leg portion 16 facing away from the inner surface 16a. The second suspending portion 15 has a substantially curved triangular shape in a side view, and tapers as the distance from the outer surface 16b increases. A second suspension hole 15 b is formed through the second suspension part 15. A crane hook (not shown) or the like can be hooked in the second suspension hole 15b. Note that the first suspension hole 14b or the second suspension hole 15b is appropriately used depending on the way of suspension.

他方の脚部１７は、接続部１８の右端に固定されている。他方の脚部１７には、第１雌ねじ部２０が形成されている。第１雌ねじ部２０は、他方の脚部１７のうち、受入空間１９に臨む内側面１７ａと、この内側面１７ａとは反対を向く外側面１７ｂとの間を左右方向に貫通している。
第１部材４は、第２部材５と協働してクランプ対象物２を挟持するためのものであり、第１部材本体２１と、第１部材本体２１から膨出する第１膨出部２２とを一体的に備えている。 The other leg 17 is fixed to the right end of the connecting portion 18. A first female screw portion 20 is formed on the other leg portion 17. The first female thread portion 20 penetrates in the left-right direction between the inner side surface 17a facing the receiving space 19 and the outer side surface 17b facing the inner side surface 17a in the other leg portion 17.
The first member 4 cooperates with the second member 5 to sandwich the clamp object 2, and includes a first member main body 21 and a first bulging portion 22 bulging from the first member main body 21. And integrated.

第１部材本体２１は、円柱状の部分であり、一方の脚部１６の第１収容孔１６ｃに収容されている。第１部材本体２１と第１収容孔１６ｃの内面とは、図示しない球面継手などを介して連結されており、第１部材本体２１が一方の脚部１６に対して揺動運動することができる。また、第１部材本体２１は、一方の脚部１６に対して、後述する軸方向Ｘにおいて進退変位できるようになっている。 The first member main body 21 is a cylindrical portion and is accommodated in the first accommodation hole 16 c of one leg portion 16. The first member main body 21 and the inner surface of the first accommodation hole 16c are connected through a spherical joint or the like (not shown), and the first member main body 21 can swing with respect to the one leg portion 16. . Further, the first member main body 21 can be moved forward and backward in the axial direction X described later with respect to one leg portion 16.

第１膨出部２２は、受入空間１９内に配置された円板状の部分であり、第１収容孔１６ｃの開口部を通して第１部材本体２１に連なっている。第１膨出部２２の直径は、第１収容孔１６ｃの開口部の直径よりも大きい。第１膨出部２２のうち、他方の脚部１７側を向く一側面２２ａに、第１受け部２３が形成されている。第１受け部２３は、一側面２２ａに突設された複数の円環状の凸部であり、これら円環状の凸部が同心に配置されている。 The first bulging portion 22 is a disk-shaped portion disposed in the receiving space 19, and continues to the first member main body 21 through the opening of the first accommodation hole 16 c. The diameter of the 1st bulging part 22 is larger than the diameter of the opening part of the 1st accommodating hole 16c. A first receiving portion 23 is formed on one side 22 a of the first bulging portion 22 facing the other leg portion 17. The 1st receiving part 23 is a plurality of annular convex parts projected on one side 22a, and these annular convex parts are arranged concentrically.

第２部材５は、他方の脚部１７に保持される主軸２４と、主軸２４とは揺動可能に連結される揺動部２５とを含んでいる。
主軸２４は、１対の脚部１６，１７の対向方向と略平行に延びる丸棒部材であり、第２部材５の一端面としての一端面２４ａが第３部材６側を向くとともに、他端面２４ｂが第１部材４側を向いて受入空間１９に臨んでいる。主軸２４の外周面には、第１雄ねじ部２６が形成されている。 The second member 5 includes a main shaft 24 held by the other leg portion 17 and a swing portion 25 connected to the main shaft 24 so as to be swingable.
The main shaft 24 is a round bar member extending substantially parallel to the opposing direction of the pair of leg portions 16, 17. One end surface 24 a as one end surface of the second member 5 faces the third member 6 side and the other end surface 24 b faces the first member 4 side and faces the receiving space 19. A first male thread portion 26 is formed on the outer peripheral surface of the main shaft 24.

第１雄ねじ部２６は、主軸２４の他端面２４ｂから一端面２４ａ側に向けて延びており、主軸２４の軸方向Ｘ（以下、単に軸方向Ｘという）において、後述するスリーブ８とは接しない程度の全長を有している。第１雄ねじ部２６は、他方の脚部１７の第１雌ねじ部２０に螺合しており、第１雄ねじ部２６を第１雌ねじ部２０に対して回転させることにより、主軸２４を第１部材４に対して軸方向Ｘに進退移動できる。主軸２４の他端面２４ｂには、揺動部２５を収容するための凹状の第２収容孔２７が形成されている。 The first male thread portion 26 extends from the other end surface 24b of the main shaft 24 toward the one end surface 24a, and does not contact the sleeve 8 described later in the axial direction X of the main shaft 24 (hereinafter simply referred to as the axial direction X). It has a total length of about. The first male screw portion 26 is screwed into the first female screw portion 20 of the other leg portion 17, and the main shaft 24 is moved to the first member by rotating the first male screw portion 26 with respect to the first female screw portion 20. 4 can move forward and backward in the axial direction X. On the other end surface 24b of the main shaft 24, a concave second accommodation hole 27 for accommodating the swinging portion 25 is formed.

揺動部２５は、揺動部本体２８と、揺動部本体２８から膨出する第２膨出部２９とを含んでいる。
揺動部本体２８は、円柱状の部分であり、主軸２４の第２収容孔２７に収容されている。揺動部本体２８は、支軸３０を介して主軸２４に連結されており、主軸２４に対して支軸３０の回りを揺動可能となっている。支軸３０は、揺動部本体２８と主軸２４の双方を貫通している。 The swing part 25 includes a swing part main body 28 and a second bulging part 29 bulging from the swing part main body 28.
The swing part main body 28 is a cylindrical part and is accommodated in the second accommodation hole 27 of the main shaft 24. The swing part main body 28 is connected to the main shaft 24 via the support shaft 30, and can swing about the support shaft 30 with respect to the main shaft 24. The support shaft 30 penetrates both the swinging part main body 28 and the main shaft 24.

第２膨出部２９は、受入空間１９内に配置された円板状の部分であり、第２収容孔２７の開口部を通して揺動部本体２８に連なっている。第２膨出部２９の直径は、第２収容孔２７の開口部の直径よりも大きいが、第１膨出部２２の直径よりも小さい。第２膨出部２９のうち、第１部材４側を向く一側面２９ａに、第２受け部３１が形成されている。第２受け部３１は、一側面２９ａに突設された複数の円環状の凸部であり、これら円環状の凸部が同心に配置されている。第２受け部３１と第１受け部２３とが協働して、クランプ対象物２を挟むようになっている。 The second bulging portion 29 is a disk-shaped portion disposed in the receiving space 19, and continues to the swinging portion main body 28 through the opening of the second accommodation hole 27. The diameter of the second bulge portion 29 is larger than the diameter of the opening portion of the second accommodation hole 27, but smaller than the diameter of the first bulge portion 22. A second receiving portion 31 is formed on one side surface 29 a of the second bulging portion 29 facing the first member 4 side. The 2nd receiving part 31 is a plurality of annular convex parts projected on one side 29a, and these annular convex parts are arranged concentrically. The 2nd receiving part 31 and the 1st receiving part 23 cooperate, and the clamp target object 2 is pinched | interposed.

図２（ａ）は、第２部材５の主軸２４の一端面２４ａおよび第３部材６の周辺の断面図であり、図２（ｂ）は、図２（ａ）のＩＩａ−ＩＩａ線に沿う断面図である。図３は、第２部材５および第３部材６の要部の斜視図である。
図２（ａ）および図３を参照して、第２部材５の主軸２４の一端面２４ａは、主軸２４の軸方向とは直交して延びる平坦な面に形成されている。この一端面２４ａには、後述するボルト４０と結合するための第２雌ねじ部３２が形成されている。第２雌ねじ部３２は、主軸２４と同軸上において、一端面２４ａから他端面２４ｂに向かって延びる円筒状に形成されている。 2A is a cross-sectional view of the periphery of the one end surface 24a of the main shaft 24 of the second member 5 and the third member 6, and FIG. 2B is along the line IIa-IIa in FIG. 2A. It is sectional drawing. FIG. 3 is a perspective view of main parts of the second member 5 and the third member 6.
With reference to FIG. 2A and FIG. 3, one end surface 24 a of the main shaft 24 of the second member 5 is formed as a flat surface extending perpendicular to the axial direction of the main shaft 24. The one end face 24a is formed with a second female thread portion 32 for coupling with a bolt 40 described later. The second female thread portion 32 is formed in a cylindrical shape extending coaxially with the main shaft 24 from the one end surface 24a toward the other end surface 24b.

主軸２４の一端における外周面２４ｃには、第３雌ねじ部３３が形成されている。この第３雌ねじ部３３は、主軸２４の径方向に延びており、外周面２４ｃと第２雌ねじ部３２とを連通している。この第３雌ねじ部３３には、止めネジ３４が螺合しており、第２雌ねじ部３２に螺合された後述するボルト４０の回り止めをするようになっている。
第３部材６は、第１雄ねじ部２６を第１雌ねじ部２０に対して回転させることにより、第２部材５を進退変位させるためのものである。第３部材６を主軸２４の周方向Ｃの一方Ｃ１に回転させることにより、所定値以下のトルクを第２部材５の主軸２４に伝達し、この主軸２４を回転させ、第２部材５を軸方向Ｘに沿って第１部材４（図１参照）側に変位できる。また、第３部材６を周方向Ｃの他方Ｃ２に回転させることにより、第３部材６と第２部材５との相対回転を規制しつつ、第３部材６のトルクを第２部材５の主軸２４に伝達して、第２部材５を軸方向Ｘに沿って第１部材４から離れる側に変位できる。 A third internal thread portion 33 is formed on the outer peripheral surface 24 c at one end of the main shaft 24. The third female thread portion 33 extends in the radial direction of the main shaft 24, and communicates the outer peripheral surface 24 c and the second female thread portion 32. A set screw 34 is screwed into the third female screw portion 33 to prevent rotation of a bolt 40 (described later) screwed into the second female screw portion 32.
The third member 6 is for moving the second member 5 forward and backward by rotating the first male screw portion 26 with respect to the first female screw portion 20. By rotating the third member 6 in one C1 in the circumferential direction C of the main shaft 24, a torque equal to or less than a predetermined value is transmitted to the main shaft 24 of the second member 5, the main shaft 24 is rotated, and the second member 5 is pivoted. It can be displaced along the direction X toward the first member 4 (see FIG. 1). Further, by rotating the third member 6 in the other direction C 2 in the circumferential direction C, the torque of the third member 6 is adjusted to the main shaft of the second member 5 while restricting the relative rotation between the third member 6 and the second member 5. 24, the second member 5 can be displaced along the axial direction X to the side away from the first member 4.

第３部材６は、第２部材５の主軸２４の一端面２４ａに隣接配置されており、この主軸２４と同軸上に並んでいる。この第３部材６は、有底円筒状をしており、円筒状の周壁３５と、環状の底壁３６とを含んでいる。
周壁３５の一端には、棒状の連結ピン３７が挿通される連結ピン挿通孔３８が１対形成されており、これらの連結ピン挿通孔３８は、周壁３５の径方向に対向している。 The third member 6 is disposed adjacent to one end surface 24 a of the main shaft 24 of the second member 5, and is arranged coaxially with the main shaft 24. The third member 6 has a bottomed cylindrical shape, and includes a cylindrical peripheral wall 35 and an annular bottom wall 36.
A pair of connection pin insertion holes 38 through which rod-shaped connection pins 37 are inserted are formed at one end of the peripheral wall 35, and these connection pin insertion holes 38 oppose each other in the radial direction of the peripheral wall 35.

底壁３６は、周壁３５の他端に配置されており、ボルト挿通孔３９が軸方向Ｘに沿って貫通形成されている。底壁３６のうち、周壁３５の内側を向く面が、底壁３６の内側面３６ａとされている。この内側面３６ａは、円環状をなしている。底壁３６のうち、内側面３６ａとは反対を向く面が、第３部材６の一端面６ａとされている。この一端面６ａは、主軸２４の軸方向Ｘと直交する方向に平坦に延びており、主軸２４の一端面２４ａとは軸方向Ｘに相対向している。 The bottom wall 36 is disposed at the other end of the peripheral wall 35, and a bolt insertion hole 39 is formed so as to penetrate along the axial direction X. Of the bottom wall 36, the surface facing the inside of the peripheral wall 35 is an inner side surface 36 a of the bottom wall 36. The inner side surface 36a has an annular shape. A surface of the bottom wall 36 facing away from the inner side surface 36 a is an end surface 6 a of the third member 6. The one end surface 6 a extends flat in a direction orthogonal to the axial direction X of the main shaft 24, and is opposed to the one end surface 24 a of the main shaft 24 in the axial direction X.

図２（ａ）を参照して、付勢機構７は、軸方向Ｘにおいて第３部材６を第２部材５側に付勢するためのものであり、ボルト４０と、付勢部材としての複数の皿ばね４１と、皿ばね４１とボルト４０との間に介装されるシート部材４２とを含んでいる。
ボルト４０は、第２部材５の主軸２４と第３部材６とを結合するものである。このボルト４０の軸部４０ａには、第２雄ねじ部４３が形成されている。ボルト４０の軸部４０ａは、底壁３６のボルト挿通孔３９および第２雌ねじ部３２を挿通しており、第２雄ねじ部４３が第２雌ねじ部３２に螺合している。第２雄ねじ部４３には、止めネジ３４の先端部が圧接されており、ボルト４０の軸部４０ａが回り止めされている。ボルト４０の頭部４０ｂは、周壁３５の内側に配置されている。 Referring to FIG. 2A, the urging mechanism 7 is for urging the third member 6 toward the second member 5 in the axial direction X, and includes a bolt 40 and a plurality of urging members. Disc spring 41, and a seat member 42 interposed between the disc spring 41 and the bolt 40.
The bolt 40 connects the main shaft 24 of the second member 5 and the third member 6. A second male screw portion 43 is formed on the shaft portion 40 a of the bolt 40. The shaft portion 40 a of the bolt 40 passes through the bolt insertion hole 39 and the second female screw portion 32 of the bottom wall 36, and the second male screw portion 43 is screwed into the second female screw portion 32. The distal end portion of the set screw 34 is pressed against the second male screw portion 43, and the shaft portion 40a of the bolt 40 is prevented from rotating. The head 40 b of the bolt 40 is disposed inside the peripheral wall 35.

シート部材４２は、周壁３５の内側において、ボルト４０の頭部４０ｂと底壁３６との間に配置された円環状の部材である。シート部材４２は、内径が軸部４０ａの外径と略同一であり、外径がボルト４０の頭部４０ｂの直径よりも大きくされており、ボルト４０の軸部４０ａに挿通されている。
各皿ばね４１は、内径部４１ａの位置が当該皿ばね４１の外径部４１ｂの位置に対して軸方向Ｘにオフセットされており、軸方向Ｘにおいて弾性反発力を生じる弾性部材を構成している。皿ばね４１は、周壁３５内において、底壁３６とシート部材４２との間に配置されている。皿ばね４１は、たとえば、２枚の皿ばね４１を同じ向きにして重ねたものを１つの皿ばねユニット４４として、複数の皿ばねユニット４４の向きを変えて直列に配置されている。１つの皿ばねユニット４４の一端面は、底壁３６の内側面３６ａに当接してこの内側面３６ａに弾性反発力を生じており、別の皿ばねユニット４４の一端面は、シート部材４２の一側面に当接してこの一側面に弾性反発力を生じている。 The sheet member 42 is an annular member disposed between the head 40 b of the bolt 40 and the bottom wall 36 inside the peripheral wall 35. The seat member 42 has an inner diameter that is substantially the same as the outer diameter of the shaft portion 40 a, has an outer diameter larger than the diameter of the head portion 40 b of the bolt 40, and is inserted through the shaft portion 40 a of the bolt 40.
Each disc spring 41 is configured with an elastic member in which the position of the inner diameter portion 41 a is offset in the axial direction X with respect to the position of the outer diameter portion 41 b of the disc spring 41, and generates an elastic repulsive force in the axial direction X. Yes. The disc spring 41 is disposed between the bottom wall 36 and the sheet member 42 in the peripheral wall 35. The disc springs 41 are arranged in series by changing the orientation of the plurality of disc spring units 44, for example, by arranging two disc springs 41 in the same direction as one disc spring unit 44. One end surface of one disc spring unit 44 abuts on the inner side surface 36 a of the bottom wall 36 to generate an elastic repulsion force on the inner side surface 36 a, and one end surface of another disc spring unit 44 is An elastic repulsive force is generated on one side surface in contact with the one side surface.

第３部材６にトルクが作用していない状態としての自由状態のとき、複数の皿ばね４１によって、底壁３６とシート部材４２とが軸方向Ｘにおいて互いに離れるように付勢されている。このとき、各皿ばね４１は、底壁３６を第２部材５の主軸２４側に付勢している。
スリーブ８は、第２部材５の主軸２４の一端面２４ａ、および第３部材６の一端面６ａを覆い隠すための円筒状の部材である。スリーブ８は、第３部材６の他端面６ｂおよび主軸２４の一部を覆っている。スリーブ８の一端部８ａには、連結ピン挿通孔４５が１対形成されており、これらの連結ピン挿通孔４５は、スリーブ８の径方向に対向している。 In a free state where no torque is applied to the third member 6, the bottom wall 36 and the sheet member 42 are urged away from each other in the axial direction X by the plurality of disc springs 41. At this time, each disc spring 41 urges the bottom wall 36 toward the main shaft 24 of the second member 5.
The sleeve 8 is a cylindrical member that covers the one end surface 24 a of the main shaft 24 of the second member 5 and the one end surface 6 a of the third member 6. The sleeve 8 covers the other end surface 6 b of the third member 6 and a part of the main shaft 24. A pair of connecting pin insertion holes 45 is formed at one end 8 a of the sleeve 8, and these connecting pin insertion holes 45 oppose each other in the radial direction of the sleeve 8.

端部材９は、作業者が第３部材６を回転操作するための操作部材であり、第３部材６の一端側に隣接して配置されている。この端部材９は、第３部材６の周壁３５内に配置される端部材本体４６と、端部材本体４６から一方側に延設される多角形部４７とを含んでいる。
端部材本体４６は、円柱状に形成されており、周壁３５の内側に嵌め入れられている。この端部材本体４６には、連結ピン挿通孔４８が径方向に貫通形成されている。この連結ピン挿通孔４８と、第３部材６の連結ピン挿通孔３８と、スリーブ８の連結ピン挿通孔４５とは、径方向において一直線に並んでおり、これらの連結ピン挿通孔４８，３８，４５を挿通する連結ピン３７によって、端部材９、第３部材６およびスリーブ８が同行回転可能に連結されている。 The end member 9 is an operation member for the operator to rotate the third member 6, and is disposed adjacent to one end side of the third member 6. The end member 9 includes an end member main body 46 disposed in the peripheral wall 35 of the third member 6, and a polygonal portion 47 extending from the end member main body 46 to one side.
The end member main body 46 is formed in a columnar shape and is fitted inside the peripheral wall 35. A connecting pin insertion hole 48 is formed in the end member body 46 in a radial direction. The connection pin insertion hole 48, the connection pin insertion hole 38 of the third member 6, and the connection pin insertion hole 45 of the sleeve 8 are aligned in a straight line in the radial direction, and these connection pin insertion holes 48, 38, The end member 9, the third member 6, and the sleeve 8 are connected to each other so as to be able to rotate together by a connecting pin 37 inserted through 45.

図２（ａ）および図２（ｂ）を参照して、多角形部４７は、第３部材６の周壁３５から一方側に露出しており、外周面４７ａの断面形状が多角形形状（本実施形態において、六角形形状）とされている。これにより、多角形部４７の外周面４７ａにスパナなどの工具を掛けて端部材９を回転させることができる。多角形部４７と端部材本体４６との接続部分には、環状の鍔部４９が形成されている。この鍔部４９は、第３部材６の周壁３５の一端面に全周に亘って接触している。 2A and 2B, the polygonal portion 47 is exposed on one side from the peripheral wall 35 of the third member 6, and the cross-sectional shape of the outer peripheral surface 47a is a polygonal shape (this In the embodiment, it is a hexagonal shape). Thereby, the end member 9 can be rotated by applying a tool such as a spanner to the outer peripheral surface 47 a of the polygonal portion 47. An annular flange portion 49 is formed at a connection portion between the polygonal portion 47 and the end member main body 46. The flange 49 is in contact with one end surface of the peripheral wall 35 of the third member 6 over the entire circumference.

多角形部４７には、ハンドルバー５０が挿通されるバー挿通孔４７ｂが径方向に貫通形成されている。バー挿通孔４７ｂは、多角形部４７の外周面４７ａの互いに平行な２面にそれぞれ開放されている。このバー挿通孔４７ｂに挿通されるハンドルバー５０の一端には、頭部５０ａが固定されており、このハンドルバー５０の他端には、ナット５０ｂがねじ結合されている。作業者は、このハンドルバー５０を回すことにより、端部材９および第３部材６を周方向Ｃに回転することができる。 A bar insertion hole 47b through which the handle bar 50 is inserted is formed in the polygonal portion 47 in a radial direction. The bar insertion holes 47b are opened to two parallel surfaces of the outer peripheral surface 47a of the polygonal portion 47, respectively. A head 50a is fixed to one end of the handle bar 50 inserted through the bar insertion hole 47b, and a nut 50b is screwed to the other end of the handle bar 50. The operator can rotate the end member 9 and the third member 6 in the circumferential direction C by turning the handle bar 50.

図４は、図２（ａ）のＩＶ−ＩＶ線に沿う断面図である。図３および図４を参照して、カム機構１０は、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に相対回転したときに、第３部材６の一端面６ａを第２部材５の主軸２４の一端面２４ａに対して軸方向Ｘに一時的に離隔させるためのものである。
カム機構１０は、第３部材６の一端面６ａに形成された複数の第１カム５１と、第２部材５の主軸２４の一端面２４ａに形成された複数の第２カム５２とを含んでいる。第１カム５１および第２カム５２は、周方向Ｃに関して等間隔に複数（本実施形態において、４つ）配置されている。なお、各第１カム５１の構成は同様であるので、１つの第１カム５１について主に説明する。また、各第２カム５２の構成は同様であるので、１つの第２カム５２について主に説明する。 FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. Referring to FIGS. 3 and 4, when the third member 6 rotates relative to the second member 5 in one circumferential direction C with respect to the second member 5, the cam mechanism 10 causes the first end surface 6 a of the third member 6 to This is for temporarily separating the end surface 24a of the main shaft 24 of the two members 5 in the axial direction X.
The cam mechanism 10 includes a plurality of first cams 51 formed on one end surface 6 a of the third member 6 and a plurality of second cams 52 formed on one end surface 24 a of the main shaft 24 of the second member 5. Yes. A plurality (four in this embodiment) of the first cam 51 and the second cam 52 are arranged at equal intervals in the circumferential direction C. Since the configuration of each first cam 51 is the same, one first cam 51 will be mainly described. Since each second cam 52 has the same configuration, only one second cam 52 will be mainly described.

第１カム５１は、第３部材６の径方向に投影したときに、直角３角形の一頂部を一端面６ａと平行に切断して取り除いた形状をしており、第１傾斜面５３と、第１絶壁５４と、第１カム５１の先端部としての第１平面６１とを含んでいる。
第１傾斜面５３は、第２部材５に対する第３部材６の相対回転方向としての周方向Ｃの一方Ｃ１の上流側、すなわち、周方向Ｃの他方Ｃ２側に向かうに従い、第３部材６の一端面６ａからの軸方向Ｘにおける突出量が連続的に多くされている。 The first cam 51 has a shape obtained by cutting and removing one apex portion of a right-angled triangle parallel to the one end surface 6a when projected in the radial direction of the third member 6, and a first inclined surface 53; A first precipice 54 and a first flat surface 61 as a tip portion of the first cam 51 are included.
The first inclined surface 53 extends toward the upstream side of one C1 in the circumferential direction C as the relative rotation direction of the third member 6 with respect to the second member 5, that is, toward the other C2 side in the circumferential direction C. The amount of protrusion in the axial direction X from the one end face 6a is continuously increased.

第１絶壁５４は、第１傾斜面５３に対して周方向Ｃの一方Ｃ１の上流側（周方向Ｃの他方Ｃ２側）に配置されており、第３部材６の一端面６ａに対して略直交している。この第１絶壁５４は、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に回転しているとき、第２カム５２とは当接せず、第３部材６が周方向Ｃの他方Ｃ２に回転しているとき、第２カム５２と当接可能である。 The first cliff 54 is arranged on the upstream side of one C1 in the circumferential direction C with respect to the first inclined surface 53 (the other C2 side in the circumferential direction C), and is substantially relative to the one end surface 6a of the third member 6. Orthogonal. The first cliff 54 does not contact the second cam 52 when the third member 6 is rotating in the circumferential direction C with respect to the second member 5, and the third member 6 is in the circumferential direction. When rotating to the other C2 of C, the second cam 52 can be contacted.

第１平面６１は、第３部材６の一端面６ａとは平行な平面であり、周方向Ｃにおける長さが、第１カム５１の高さＨ１と略同じである。この第１平面６１は、第１傾斜面５３の先端部と第１絶壁５４の先端部とを接続している。
第２カム５２は、第２部材５の主軸２４の径方向に投影したときに、直角３角形の一頂部を一端面２４ａと平行に切断して取り除いた形状をしており、第２傾斜面５５と、第２絶壁５６と、第２カムの先端部としての第２平面６２とを含んでいる。 The first plane 61 is a plane parallel to the one end surface 6 a of the third member 6, and the length in the circumferential direction C is substantially the same as the height H 1 of the first cam 51. The first flat surface 61 connects the distal end portion of the first inclined surface 53 and the distal end portion of the first precipice 54.
The second cam 52 has a shape obtained by cutting and removing one apex portion of a right triangle from the second member 5 in parallel with the one end face 24a when projected in the radial direction of the main shaft 24 of the second member 5. 55, the 2nd precipice 56, and the 2nd plane 62 as a front-end | tip part of a 2nd cam.

第２傾斜面５５は、周方向Ｃの一方Ｃ１の下流側に向かうに従い、主軸２４の一端面２４ａからの軸方向Ｘにおける突出量が連続的に多くされている。主軸２４の一端面２４ａからの第２カム５２の高さＨ２は、第３部材６の一端面６ａからの第１カム５１の高さＨ１と略同じとされている。また、主軸２４の他端面２４ｂに対する第２傾斜面５５の傾斜角θ２は、第３部材６の一端面６ａに対する第１傾斜面５３の傾斜角θ１と略同じにされている。第２傾斜面５５は、第１傾斜面５４と略全面に亘って面接触することができる。 As the second inclined surface 55 moves toward the downstream side of one C1 in the circumferential direction C, the amount of protrusion in the axial direction X from the one end surface 24a of the main shaft 24 is continuously increased. The height H2 of the second cam 52 from the one end surface 24a of the main shaft 24 is substantially the same as the height H1 of the first cam 51 from the one end surface 6a of the third member 6. The inclination angle θ2 of the second inclined surface 55 with respect to the other end surface 24b of the main shaft 24 is substantially the same as the inclination angle θ1 of the first inclined surface 53 with respect to the one end surface 6a of the third member 6. The second inclined surface 55 can be in surface contact with the first inclined surface 54 over substantially the entire surface.

第２絶壁５６は、第２傾斜面５５に対して周方向Ｃの一方Ｃ１の下流側（周方向Ｃの他方Ｃ２側）に配置されており、主軸２４の一端面２４ａに対して略直交している。この第２絶壁５６は、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に回転しているとき、第１カム５１とは当接せず、第３部材６が周方向Ｃの他方Ｃ２に回転しているとき、第１カム５１と当接する。 The second precipitous wall 56 is disposed on the downstream side of one C1 in the circumferential direction C with respect to the second inclined surface 55 (the other C2 side in the circumferential direction C), and is substantially orthogonal to the one end surface 24a of the main shaft 24. ing. The second cliff 56 does not contact the first cam 51 when the third member 6 is rotating in the circumferential direction C with respect to the second member 5, and the third member 6 is in the circumferential direction. When rotating to the other C2 of C, it contacts the first cam 51.

第２平面６２は、主軸２４の一端面２４ａとは平行な平面であり、周方向Ｃにおける長さが、第２カム５２の高さＨ２と略同じである。この第２平面６２は、第２傾斜面５５の先端部と第２絶壁５６の先端部とを接続している。第２平面６２と第１平面６１とは平行に並んでいる。
第１打撃機構１１は、第１カム５１の第１平面６１に配置された第１打撃部５７と、第２部材５の主軸２４の一端面２４ａに配置された第１被打撃部５８とを含んでいる。 The second plane 62 is a plane parallel to the one end surface 24 a of the main shaft 24, and the length in the circumferential direction C is substantially the same as the height H 2 of the second cam 52. The second flat surface 62 connects the distal end portion of the second inclined surface 55 and the distal end portion of the second precipice 56. The second plane 62 and the first plane 61 are arranged in parallel.
The first striking mechanism 11 includes a first striking portion 57 disposed on the first plane 61 of the first cam 51 and a first striking portion 58 disposed on one end surface 24a of the main shaft 24 of the second member 5. Contains.

第１打撃部５７は、第１平面６１の略全域に配置されている。
第１被打撃部５８は、第２部材５の主軸２４の一端面２４ａにおいて、第２カム５２の第２絶壁５６とは周方向Ｃに隣接して配置されており、平坦な形状をしている。第１被打撃部５８と第１打撃部５７とは、互いに平行に並んでおり、両者が十分広い面積で面接触することができる。 The first striking portion 57 is disposed on substantially the entire area of the first plane 61.
The first hit portion 58 is disposed adjacent to the second cliff 56 of the second cam 52 in the circumferential direction C on the one end surface 24a of the main shaft 24 of the second member 5, and has a flat shape. Yes. The first hit portion 58 and the first hit portion 57 are arranged in parallel to each other, and both can be in surface contact with a sufficiently wide area.

第２打撃機構１２は、第３部材６の一端面６ａに配置された第２打撃部５９と、第２カム５２の第２平面６２に配置された第２被打撃部６０とを含んでいる。
第２打撃部５９は、第３部材６の一端面６ａにおいて、第１カム５１の第１絶壁５４とは周方向Ｃに隣接して配置されており、平坦な形状をしている。
第２被打撃部６０は、第２平面６２の略全域に配置されている。第２被打撃部６０と第２打撃部５９とは、互いに平行に並んでいる。 The second striking mechanism 12 includes a second striking portion 59 disposed on one end surface 6 a of the third member 6 and a second striking portion 60 disposed on the second flat surface 62 of the second cam 52. .
The second striking portion 59 is disposed adjacent to the first steep wall 54 of the first cam 51 in the circumferential direction C on the one end surface 6a of the third member 6, and has a flat shape.
The second hit portion 60 is disposed in substantially the entire area of the second plane 62. The second hit part 60 and the second hit part 59 are arranged in parallel to each other.

付勢機構７（図２（ａ）参照）によって第３部材６が第２部材５の主軸２４側に弾性的に付勢されていることにより、軸方向Ｘにおいて、第１打撃機構１１の第１打撃部５７が第１被打撃部５８側に付勢されている。同様に、軸方向Ｘにおいて、第２打撃機構１２の第２打撃部５９が第２被打撃部６０側に付勢されている。
図５（ａ）および図５（ｂ）は、それぞれ、クランプ１にクランプ対象物２を挟持させるときの手順を説明するための一部断面側面図である。図５（ａ）を参照して、クランプ１を用いてクランプ対象物２を挟持するときは、まず、第２部材５の主軸２４の第１雄ねじ部２６を第１雌ねじ部２０に対して回転させることにより、軸方向Ｘにおける第２部材５の位置を調節する。これにより、第１部材４の第１受け部２３と、第２部材５の第２受け部３１との間の隙間を、クランプ対象物２の所定の被挟持部２ａの厚みより広くしておく。 The third member 6 is elastically urged toward the main shaft 24 side of the second member 5 by the urging mechanism 7 (see FIG. 2A). One striking portion 57 is biased toward the first hit portion 58. Similarly, in the axial direction X, the second hitting portion 59 of the second hitting mechanism 12 is urged toward the second hitting portion 60 side.
FIG. 5A and FIG. 5B are partial cross-sectional side views for explaining a procedure when the clamp object 2 is clamped by the clamp 1. Referring to FIG. 5A, when the clamp object 2 is clamped using the clamp 1, first, the first male screw portion 26 of the main shaft 24 of the second member 5 is rotated with respect to the first female screw portion 20. By doing so, the position of the second member 5 in the axial direction X is adjusted. Thereby, the clearance gap between the 1st receiving part 23 of the 1st member 4 and the 2nd receiving part 31 of the 2nd member 5 is made wider than the thickness of the predetermined clamping part 2a of the clamp target object 2. .

次に、クランプ対象物２の被挟持部２ａを、黒塗り矢印で示すように、クランプ本体３の受入空間１９内に挿入し、両受け部２３，３１間に被挟持部２ａを配置する。この状態から、作業者がハンドルバー５０を周方向Ｃの一方Ｃ１に回転する。これにより、ハンドルバー５０とともに、端部材９、連結ピン３７、スリーブ８および第３部材６が周方向Ｃの一方Ｃ１に回転する。 Next, the clamped portion 2 a of the clamp object 2 is inserted into the receiving space 19 of the clamp body 3 as indicated by a black arrow, and the clamped portion 2 a is disposed between the receiving portions 23 and 31. From this state, the operator rotates the handle bar 50 in one circumferential direction C1. As a result, the end member 9, the connecting pin 37, the sleeve 8, and the third member 6 are rotated in the circumferential direction C along with the handle bar 50.

また、図４および図５（ａ）に示すように、カム機構１０において、各第１カム５１の第１傾斜面５３および対応する第２カム５２の第２傾斜面５５が皿ばね４１の付勢力により互いに面接触していることにより、第３部材６および第２部材５が周方向Ｃの一方Ｃ１に同行回転する。第２部材５が周方向Ｃの一方Ｃ１に回転することにより、第１雄ねじ部２６が第１雌ねじ部２０に対して周方向Ｃの一方Ｃ１に回転し、第２部材５が第１部材４側に変位する。 4 and 5A, in the cam mechanism 10, the first inclined surface 53 of each first cam 51 and the corresponding second inclined surface 55 of the second cam 52 are attached to the disc spring 41. The third member 6 and the second member 5 are rotated together with one side C1 in the circumferential direction C by being in surface contact with each other by the force. When the second member 5 rotates in the circumferential direction C, the first male screw portion 26 rotates with respect to the first female screw portion 20 in the circumferential direction C, and the second member 5 becomes the first member 4. Displace to the side.

これにより、図５（ｂ）に示すように、第２部材５の第２受け部３１、および第１部材４の第１受け部２３が、クランプ対象物２の被挟持部２ａを挟持する。この状態から、作業者がハンドルバー５０を周方向Ｃの一方Ｃ１にさらに回転させると、第３部材６から第２部材５に伝わるトルクが所定値（たとえば、数ｋＮ・ｃｍ）を超え、第１および第２受け部２３，３１によるクランプ対象物２の挟持力が十分な値になる。 Thereby, as shown in FIG.5 (b), the 2nd receiving part 31 of the 2nd member 5, and the 1st receiving part 23 of the 1st member 4 clamp the to-be-clamped part 2a of the clamp target object 2. As shown in FIG. From this state, when the operator further rotates the handle bar 50 in one of the circumferential directions C1, the torque transmitted from the third member 6 to the second member 5 exceeds a predetermined value (for example, several kN · cm), The clamping force of the clamping object 2 by the 1 and 2nd receiving parts 23 and 31 becomes a sufficient value.

すると、図６（ａ）および図６（ｂ）に示すように、皿ばね４１の付勢力に抗して第２部材５に対して第３部材６が周方向Ｃの一方Ｃ１に相対回転し始める。このとき、第１カム５１の第１傾斜面５３が、対応する第２カム５２の第２傾斜面５５に対して周方向Ｃの一方Ｃ１に滑る。これにより、各皿ばね４１が第３部材６を第２部材５側に付勢する付勢力に抗して、第３部材６が軸方向Ｘにおいて第２部材５から離れる方向に変位し、第３部材６の一端面６ａと第２部材５の主軸２４の一端面２４ａとの間の間隔が広がる。 6 (a) and 6 (b), the third member 6 rotates relative to the second member 5 in the circumferential direction C1 against the biasing force of the disc spring 41. start. At this time, the first inclined surface 53 of the first cam 51 slides in one C1 in the circumferential direction C with respect to the corresponding second inclined surface 55 of the second cam 52. Thereby, each disc spring 41 is displaced in the direction away from the second member 5 in the axial direction X against the urging force that urges the third member 6 toward the second member 5, The space | interval between the one end surface 6a of the 3 member 6 and the one end surface 24a of the main axis | shaft 24 of the 2nd member 5 spreads.

すなわち、第２部材５に対する第３部材６の相対回転角が相対的に少ないとき、軸方向Ｘにおける、第１打撃部５７と第１被打撃部５８との間の間隔が広がるとともに、軸方向Ｘにおける、第２打撃部５９と第２被打撃部６０との間の間隔が広がる。
そして、第２部材５に対して第３部材６が周方向Ｃの一方Ｃ１にさらに回転することにより、第２部材５に対する第３部材６の相対回転角が相対的に多くなると、第１平面６１と第２平面６２とが面接触し、その後、図７に示すように、第１カム５１の第１平面６１と第２カム５２の第２平面６２との係合が解除される。これにより、第１打撃機構１１の第１打撃部５７が第１被打撃部５８を打撃するとともに、第２打撃機構１２の第２打撃部５９が第２被打撃部６０を打撃し、第３部材６と第２部材５との間で打撃による振動および音が生じる。 That is, when the relative rotation angle of the third member 6 with respect to the second member 5 is relatively small, the interval between the first hit portion 57 and the first hit portion 58 in the axial direction X is widened, and the axial direction In X, the interval between the second hitting part 59 and the second hitting part 60 increases.
When the relative rotation angle of the third member 6 with respect to the second member 5 is relatively increased by further rotating the third member 6 in the circumferential direction C with respect to the second member 5, the first plane 61 and the second plane 62 come into surface contact, and thereafter, the engagement between the first plane 61 of the first cam 51 and the second plane 62 of the second cam 52 is released, as shown in FIG. As a result, the first striking portion 57 of the first striking mechanism 11 strikes the first striking portion 58, the second striking portion 59 of the second striking mechanism 12 strikes the second striking portion 60, and the third Vibration and sound due to impact are generated between the member 6 and the second member 5.

第２カム５２との係合が解除された第１カム５１は、第３部材６が周方向Ｃの一方Ｃ１にさらに回転されることにより、主軸２４の一端面２４ａ上を摺動し、図６（ｂ）に示すように、再び第２カム５２に係合する。そして、第３部材６から第２部材５に伝わるトルクが前記所定値を超えている間、前述したのと同様に、各第１カム５１が対応する第２カム５２に乗り上げた後に両カム５１，５２の係合が解除され、第１打撃機構１１および第２打撃機構１２によって、打撃による振動および音が生じる。 The first cam 51 disengaged from the second cam 52 slides on the one end surface 24a of the main shaft 24 as the third member 6 is further rotated in one circumferential direction C1. As shown in FIG. 6B, the second cam 52 is engaged again. Then, while the torque transmitted from the third member 6 to the second member 5 exceeds the predetermined value, as described above, after the first cams 51 ride on the corresponding second cams 52, the two cams 51 , 52 are released, and the first striking mechanism 11 and the second striking mechanism 12 generate vibration and sound due to the striking.

一方、第２部材５を緩める場合には、第３部材６を周方向Ｃの他方Ｃ２に回転する。これにより、図８に示すように、第１カム５１の第１絶壁５４は、第２カム５２の第２絶壁５６に当接し、第３部材６と第２部材５とが周方向Ｃの他方Ｃ２に同行回転する。第２部材５が周方向Ｃの他方Ｃ２に回転することにより、図５（ａ）に示すように、第１雄ねじ部２６が第１雌ねじ部２０に対して回転し、第２部材５が受入空間１９から退避するように変位する。その結果、第１および第２受け部２３，３１による、クランプ対象物２の被挟持部２ａの挟持が解除されクランプ対象物２をクランプ１から取り外すことができる。 On the other hand, when loosening the second member 5, the third member 6 is rotated in the other direction C2 in the circumferential direction C. Accordingly, as shown in FIG. 8, the first cliff 54 of the first cam 51 abuts on the second cliff 56 of the second cam 52, and the third member 6 and the second member 5 are in the other circumferential direction C. Rotate with C2. As the second member 5 rotates in the other direction C2 in the circumferential direction C, as shown in FIG. 5A, the first male screw portion 26 rotates with respect to the first female screw portion 20, and the second member 5 receives. It is displaced so as to retreat from the space 19. As a result, the clamping of the clamped object 2 to be clamped 2 a by the first and second receiving parts 23 and 31 is released, and the clamped object 2 can be detached from the clamp 1.

以上説明したように、本実施形態によれば、第３部材６を周方向Ｃの一方Ｃ１に回転させることにより、第２部材５の第１雄ねじ部２６をクランプ本体３の第１雌ねじ部２０に対して周方向Ｃの一方Ｃ１に回転させて、第２部材５を第１部材４側に進めることができる。
そして、第１受け部２３および第２受け部３１でクランプ対象物２の被挟持部２ａを挟持した状態で、第３部材６から第２部材５に伝わるトルクが所定値に達し、十分な挟持力でクランプ対象物２を挟持できるようになったとき、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に相対回転することで、第１打撃部５７が第１被打撃部５８を打撃するとともに、第２打撃部５９が第２被打撃部６０を打撃する。 As described above, according to the present embodiment, the first male screw portion 26 of the second member 5 is moved to the first female screw portion 20 of the clamp body 3 by rotating the third member 6 in one circumferential direction C1. The second member 5 can be advanced to the first member 4 side by rotating in the circumferential direction C to one side C1.
Then, the torque transmitted from the third member 6 to the second member 5 reaches a predetermined value with the first receiving portion 23 and the second receiving portion 31 holding the clamped portion 2a of the clamped object 2, and sufficient clamping is achieved. When the clamp object 2 can be clamped by force, the third member 6 rotates relative to the second member 5 in one of the circumferential directions C1 so that the first striking portion 57 is subjected to the first hit. While hitting the part 58, the second hitting part 59 hits the second hit part 60.

このときの振動と音により、十分な挟持力でクランプ対象物２を挟持していることを作業者が確認できるので、目視確認が不要である。このため、クランプ１に汚れが付着しているときや、クランプ１が見えないときでも、十分な挟持力でクランプ対象物２を挟持できていることを、確実に確認できる。
より具体的には、第３部材６が第２部材５の主軸２４に対して周方向Ｃの一方Ｃ１に相対回転し始めると、各第１カム５１と対応する第２カム５２との係合により、第１打撃部５７と第１被打撃部５８とが軸方向Ｘにおいて離隔するとともに、第２打撃部５９と第２被打撃部６０とが軸方向Ｘにおいて離隔する。第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１にさらに相対回転すると、両カム５１，５２の係合が解除される。 Since the operator can confirm that the clamping object 2 is clamped with sufficient clamping force by the vibration and sound at this time, visual confirmation is unnecessary. For this reason, even when dirt is attached to the clamp 1 or when the clamp 1 is not visible, it can be surely confirmed that the clamp object 2 can be clamped with a sufficient clamping force.
More specifically, when the third member 6 starts to rotate relative to the main shaft 24 of the second member 5 in one of the circumferential directions C1, the first cam 51 and the corresponding second cam 52 are engaged. Thus, the first striking portion 57 and the first hit portion 58 are separated from each other in the axial direction X, and the second striking portion 59 and the second hit portion 60 are separated from each other in the axial direction X. When the third member 6 further rotates relative to the second member 5 in one circumferential direction C, the engagement of the cams 51 and 52 is released.

このとき、付勢機構７の付勢力によって、第１打撃部５７が第１被打撃部５８に勢いよく打撃されるとともに、第２打撃部５９が第２被打撃部６０に勢いよく打撃されるので、打撃による振動と音を十分に生じることができ、十分な挟持力でクランプ対象物２を挟持できていることを、より確実に確認できる。
さらに詳述すると、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に相対回転することにより、第１傾斜面５３と第２傾斜面５５とが係合し、第１打撃部５７が第１被打撃部５８に対して軸方向Ｘに離隔するとともに、第２打撃部５９が第２被打撃部６０に対して軸方向Ｘに離隔する。 At this time, the first striking portion 57 is hit with the first hit portion 58 with the biasing force of the biasing mechanism 7 and the second hit portion 59 is hit with the second hit portion 60 with great force. Therefore, vibration and sound due to impact can be sufficiently generated, and it can be confirmed more reliably that the clamping object 2 can be clamped with a sufficient clamping force.
More specifically, when the third member 6 rotates relative to the second member 5 in one of the circumferential directions C1, the first inclined surface 53 and the second inclined surface 55 are engaged, and the first strike The portion 57 is separated from the first hit portion 58 in the axial direction X, and the second hit portion 59 is separated from the second hit portion 60 in the axial direction X.

そして、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１にさらに相対回転すると、第１絶壁５４が第２絶壁５６を乗り越えて、第１および第２傾斜面５３，５５同士の係合が一気に解除されるので、第１打撃部５７を第１被打撃部５８に勢いよく打つことができるとともに、第２打撃部５９を第２被打撃部６０に勢いよく打つことができる。
また、第１カム５１の先端部としての第１平面６１を第１打撃部５７として用いている。カム機構１０の第１カム５１を第１打撃機構１１に兼用することができ、簡易な構成で第１打撃機構１１を構成できる。 When the third member 6 further rotates relative to the second member 5 in one of the circumferential directions C1, the first steep wall 54 gets over the second steep wall 56, and the first and second inclined surfaces 53, 55 are in contact with each other. Is released at a stroke, so that the first hitting portion 57 can be hit with the first hit portion 58 and the second hit portion 59 can be hit with the second hit portion 60. .
Further, the first flat surface 61 as the tip portion of the first cam 51 is used as the first striking portion 57. The first cam 51 of the cam mechanism 10 can also be used as the first striking mechanism 11, and the first striking mechanism 11 can be configured with a simple configuration.

また、第２カム５２の先端部としての第２平面６２を第２被打撃部６０として用いている。カム機構１０の第２カムを第２打撃機構１２に兼用することができ、より簡易な構成で第２打撃機構１２を構成できる。
さらに、皿ばね４１の枚数や向きや、ボルト４０の頭部４０ｂの位置などを適宜設定することにより、第１カム５１を第２カム５２に押圧する力のうちの軸方向Ｘの成分の値を適宜設定できる。これにより、第３部材６が第２部材５に対して周方向Ｃの一方Ｃ１に相対回転し始めるときのトルクを容易に調整できる。 Further, the second flat surface 62 as the tip portion of the second cam 52 is used as the second hit portion 60. The second cam of the cam mechanism 10 can also be used as the second striking mechanism 12, and the second striking mechanism 12 can be configured with a simpler configuration.
Furthermore, the value of the component in the axial direction X of the force that presses the first cam 51 against the second cam 52 by appropriately setting the number and direction of the disc springs 41, the position of the head 40b of the bolt 40, and the like. Can be set as appropriate. Thereby, it is possible to easily adjust the torque when the third member 6 starts to rotate relative to the second member 5 in one circumferential direction C1.

本発明は、以上の実施形態の内容に限定されるものではなく、請求項記載の範囲内において種々の変更が可能である。
たとえば、第１打撃機構１１の第１打撃部５７を、カム機構１０の第１カム５１に設ける構成としたが、これに限らず、第１カム５１とは別に第１打撃部を第３部材６の一端面６ａに形成してもよい。同様に、第２打撃機構１２の第２被打撃部６０を、カム機構１０の第２カム５２に設ける構成としたが、これに限らず、第２カム５２とは別に第２被打撃部を第２部材５の主軸２４の一端面２４ａに形成してもよい。 The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.
For example, the first striking portion 57 of the first striking mechanism 11 is provided on the first cam 51 of the cam mechanism 10. However, the present invention is not limited to this, and the first striking portion is separated from the first cam 51 by the third member. 6 may be formed on one end face 6a. Similarly, the second hit portion 60 of the second hitting mechanism 12 is provided on the second cam 52 of the cam mechanism 10. However, the present invention is not limited to this, and the second hit portion is separated from the second cam 52. You may form in the end surface 24a of the main axis | shaft 24 of the 2nd member 5. FIG.

また、第１打撃機構１１および第２打撃機構１２の何れか一方のみを設けてもよい。
さらに、本実施形態では、カム機構１０と、第１打撃機構１１と、第２打撃機構１２とを備える構成について説明したが、本発明は、これに限らない。要は、第３部材６と第２部材５の主軸２４との間で所定値より大きいトルクが作用したときに、両部材６，５が相対回転し、これに伴い、第３部材６に設けた打撃部が、第２部材５に設けた被打撃部を打撃する構成であればよい。 Further, only one of the first striking mechanism 11 and the second striking mechanism 12 may be provided.
Furthermore, although this embodiment demonstrated the structure provided with the cam mechanism 10, the 1st hitting mechanism 11, and the 2nd hitting mechanism 12, this invention is not restricted to this. In short, when a torque larger than a predetermined value acts between the third member 6 and the main shaft 24 of the second member 5, both the members 6 and 5 rotate relative to each other, and accordingly, the third member 6 is provided. The hit | damage part should just be the structure which hits the hit | damage part provided in the 2nd member 5. FIG.

１クランプ
２クランプ対象物
３クランプ本体
４第１部材
５第２部材
６第３部材
６ａ（第３部材の）一端面
７付勢機構
１０カム機構
１１第１打撃機構
１２第２打撃機構
１６一方の脚部（１対の脚部の一方）
１７他方の脚部（１対の脚部の他方）
２０第１雌ねじ部
２３第１受け部
２４ａ（第２部材の）一端面
２６第１雄ねじ部
３１第２受け部
５１第１カム
５２第２カム
５３第１傾斜面
５４第１絶壁
５５第２傾斜面
５６第２絶壁
５７第１打撃部
５８第１被打撃部
５９第２打撃部
６０第２被打撃部
６１第１平面（第１カムの先端部）
６２第２平面（第２カムの先端部）
Ｃ１周方向の一方（相対回転方向）
Ｘ軸方向 DESCRIPTION OF SYMBOLS 1 Clamp 2 Clamp object 3 Clamp main body 4 1st member 5 2nd member 6 3rd member 6a (3rd member) one end surface 7 Energizing mechanism 10 Cam mechanism 11 1st impact mechanism 12 2nd impact mechanism 16 One side Leg (one of a pair of legs)
17 The other leg (the other of the pair of legs)
20 First female screw portion 23 First receiving portion 24a (one end surface) 26 First male screw portion 31 Second receiving portion 51 First cam 52 Second cam 53 First inclined surface 54 First precipice 55 Second inclination Surface 56 Second precipice 57 First hit portion 58 First hit portion 59 Second hit portion 60 Second hit portion 61 First plane (first cam tip)
62 Second plane (tip of second cam)
C1 Circumferential direction (relative rotational direction)
X axis direction

Claims

A clamp body including a pair of legs facing each other with a gap between them;
A first member including a first receiving portion connected to one of the pair of leg portions and receiving a clamp object;
A male screw part that is screwed into a female screw part formed on the other of the pair of leg parts, and a second receiving part that is connected to the male screw part and cooperates with the first receiving part to sandwich the object to be clamped. A second member;
A third member for rotating the male screw part with respect to the female screw part, coupled to the male screw part so as to be able to transmit a torque of a predetermined value or less;
Including a hit portion provided in the second member and a hit portion provided in the third member, and a torque transmitted between the second member and the third member exceeds the predetermined value and And a striking mechanism for striking the striking part when the third member rotates relative to the second member.

A biasing mechanism that resiliently biases the striking portion toward the striking portion;
A first cam formed on one end surface of the third member; and a second cam formed on one end surface of the second member opposite to the one end surface of the third member, When the relative rotation angle of the third member is relatively small, the cam that separates the hit portion and the hit portion in the axial direction of the male screw portion by the engagement of the first cam and the second cam A mechanism,
The engagement of the first cam and the second cam is released when the relative rotation angle is relatively increased, and the hitting portion hits the hit target portion. Clamps.

The first cam has a first inclined surface in which an amount of protrusion in the axial direction from the one end surface of the third member is increased toward an upstream side in a relative rotation direction of the third member with respect to the second member. And a first precipice disposed on the upstream side in the relative rotational direction with respect to the first inclined surface,
The second cam has a second inclined surface in which an amount of protrusion in the axial direction from the one end surface of the second member is increased toward the downstream side in the relative rotation direction, and the second inclined surface. The clamp according to claim 2, further comprising a second cliff disposed downstream of the relative rotation direction.

The hitting portion includes a tip portion of the first cam,
The said hit | damage part is arrange | positioned adjacent to the said 2nd precipice in the said one end surface of the said 2nd member, The clamp of Claim 3 characterized by the above-mentioned.

The hitting portion is disposed adjacent to the first precipice at the one end surface of the third member,
The clamp according to claim 3 or 4, wherein the hit part includes a tip part of the second cam.