JP2001113472A - Torque wrench with marker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque wrench with a marker applicable to a torque wrench using a fastening shaft inside which the marker cannot move. SOLUTION: A ratchet cylinder 5 engages with a head part 3 of a wrench body 2 by a ratchet. A hexagonal shaft 6 for engaging with a fastening object bolt B is fixed to a tip part of the ratchet cylinder 5. A marker rod 7 is slidingly inserted into the ratchet cylinder 5, a marker support cylinder 29 is slidingly inserted outside, and is connected to the marker rod 7 by a connecting pin 9 penetrating through a slit 5b. A marker 8 is supported by the marker support cylinder 29. When reaching prescribed fastening torque, the marker rod 7 moves in the axial direction by operation of a toggle link 11 in a handle part 4 to perform imprinting by the marker 8. The marker support cylinder 29 has a positioning projection piece 32 for engaging with an ear piece E1 in a fastening position of the bolt B. At fastening operation time of the bolt B, the marker support cylinder 29 is relatively rotated to the ratchet cylinder 5 to regulate an imprinting position on the ear piece E1 by the marker 9 to a specific position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque wrench used for tightening bolts, and when a tightening torque reaches a predetermined value, an attached marker is operated to mark the bolt or the periphery thereof. The present invention relates to an attached torque wrench.

[0002]

2. Description of the Related Art As a torque wrench with a marker, for example, a torque wrench described in Japanese Patent Application Laid-Open No. 6-297352 is known. The torque wrench with a marker includes a wrench main body having a head and a handle, a ratchet cylinder that ratchet-engages the head of the wrench main body, and engages with a tightened bolt or nut fixed to a tip end of the ratchet cylinder. It has a possible socket and a marker rod which is slidably inserted in the ratchet cylinder in the axial direction and has a marker at the tip. And when the specified tightening torque is reached,
The operation of a toggle link provided in the handle of the wrench main body causes the marker rod to slide in the axial direction toward the distal end, and moves the marker in the socket to seal the end face of the bolt.

[0003]

For example, when an object to be applied is a hexagon socket head bolt, it is necessary to use a tightening shaft such as a hexagon wrench instead of a socket as a member to be engaged with the bolt. However, in the above-described conventional torque wrench with a marker, since the marker moves in the center of the socket, it cannot be applied to a torque wrench that does not use a socket. Therefore, the present invention provides a torque wrench with a marker that can be applied to a torque wrench using a tightening shaft that cannot employ a structure in which the marker moves inside, and a marker with a marker that is particularly suitable for application to a fastening bolt of a trolley wire hanger. The task is to provide a wrench.

[0004]

According to the present invention, the marker 8 is provided outside the ratchet cylinder 5 and connected to the marker rod 7 through an axial slit 5b formed in the ratchet cylinder 5, and the marker B It was arranged so that it might be located on the side of a head and could be stamped with the marker 8 to the screwing object of a bolt. Further, in a torque wrench for the fastening bolt B of the trolley wire hanger, the marker support cylinder 29 is connected to the connection pin 9 so as to be slidable around the axis, and the marker support cylinder 5
Are provided with positioning projections 32 which engage with the side surfaces of the hangier at the tightening position of the bolt B, and rotate the marker support cylinder 29 relative to the ratchet cylinder 5 during the tightening operation of the bolt B, so that the marker 9 The stamping position is restricted to a fixed position.

[0005]

Embodiments of the present invention will be described with reference to the drawings. 1 is a front view in which a part of a torque wrench with a marker is cut away, FIG. 2 is a side view of the torque wrench with a marker, FIG. 3 is a sectional view taken along the line III-III in FIG. 1, and FIG. IV sectional view, FIGS. 5 and 6 are plan views of a main part of the marker driving mechanism, and FIG. 7 is a VII-VII sectional view in FIG.

[0006] The illustrated torque wrench 1 with a marker is devised for tightening a bolt B for tightening an ear piece E1 of a hangier E for suspending a trolley wire on a train line. However, it goes without saying that the basic structure of the torque wrench 1 with a marker can be applied to a torque wrench for tightening another bolt for a different purpose.

The wrench body 2 of the torque wrench 1 has a head 3
And a handle 4. The head end 3 of the wrench main body 2 has a ratchet engagement with the base end of the ratchet cylinder 5. A hexagonal shaft 6, which is a tightening member of the bolt B to be tightened, is fixed to the tip of the ratchet cylinder 5. The hexagonal shaft 6 can be engaged with a hexagonal hole in the head of the bolt B. A marker rod 7 is inserted into the ratchet cylinder 5 so as to be slidable in the axial direction. A marker 8 that can be stamped on the side of the head of the bolt B is connected to the tip end of the marker rod 7 via a connecting pin 9. The marker rod 7 is slid in the axial direction toward the distal end by the marker driving mechanism 10 that operates when the bolt tightening torque reaches a predetermined value, and performs a stamping operation on the ear piece E1.

[0008] The handle 4 of the wrench body 2 is, as in the prior art,
It comprises a tube 12 in which a toggle link mechanism 11 is housed. A shaft 13 connected to the head 3 is inserted into the distal end of the tube 12, and the tube 1 is
It is pivoted on 2. The support shaft 13 is a toggle link mechanism 1
1 is connected to the toggle receiving arm 15. The toggle receiving arm 15 is locked to the tail end of the tube 12 via a spring receiver 16 and a spring 17 so that the spring pressure can be adjusted.

The marker driving mechanism 10 has a lever 18 and an L-shaped link 19. The lever 18 has its proximal end pivotally supported by the tube 12 and its other end engaged with the marker head 20. The L-shaped link 19 is, as shown in FIG.
A pivot pin 22 is pivotally supported by a bracket 21 fixed to the outside of the tube 12 in the middle, and one end abuts on a side surface of the support shaft 13 in the tube 12 via an adjusting screw 23 screwed into the tube. The other end is connected to the lever 1 via the sphere 24.
8 abuts. Reference numeral 25 denotes a cover of the marker driving mechanism 10.

The structure of the marker mechanism 26 will be described in detail with reference to FIG. The ratchet cylinder 5 has a ratchet 5a that engages with a ratchet pawl (not shown) in the head 3. A marker head 20 is inserted into one end of the ratchet cylinder 5 and a hexagonal shaft 6 is fixed to the other end. The marker head 20 is inserted into the ratchet cylinder 5 slidably in the axial direction and restorable by a spring 27.
Thereby, it is connected to the marker rod 7 in the ratchet cylinder 5. On the outer periphery of the ratchet cylinder 5, a marker support cylinder 29 is slidably inserted in the axial direction and the direction around the axis. The ratchet cylinder 5 has an axial slit 5b.
Are formed, and both ends of the pin 9 penetrating the marker rod 7 penetrate the slit 5b and engage with the annular groove of the marker support cylinder 29. Therefore, the marker support cylinder 29 is slidable in the axial direction with respect to the ratchet cylinder 5 together with the marker rod 7 via the pin 9 and is also slidable around the axis. At the tip end of the marker support cylinder 29, an arm 3
Marker 8 is held via 0. The marker 8 is disposed close to the hexagonal axis 6 with its tip facing the side of the bolt B, and can be stamped on the ear piece E1 by a stamping operation that moves in the axial direction. Reference numeral 31 denotes a cylindrical marker cover which is fixed to the outer periphery of the marker support cylinder 29 on the base end side. Reference numeral 32 denotes a pair of positioning projections, the base ends of which are fixed to the outer periphery of the marker cover 31 and extend in parallel with the hexagonal axis 6. By tightening the bolt B with the pair of positioning projections 32 abutting the shoulder of the ear piece E1, the marking position by the marker 8 is fixed.

When tightening the bolt B to be tightened,
As shown in FIG. 1, the positioning protrusion 31 is applied to the shoulder of the ear piece E1, the hexagonal shaft 6 is engaged with the bolt B, and then the handle 4 of the torque wrench body 2 is reciprocated to rotate. The hexagonal shaft 6 rotates via 5, and the bolt B is tightened. When the tightening torque reaches a predetermined value, the toggle link 11 in the handle 4 operates. That is, before reaching the predetermined torque, the toggle link 11 is in the state shown in FIG. 5, but when the tightening torque increases, the support shaft 13 connected to the head 3 compresses the spring 17 and causes the receiving arm 15 to move the receiving arm 15 to the handle 4.
In FIG. 5, the toggle link 11 gradually rotates in the counterclockwise direction around the pivot pin 14 while retracting to the tail end side of FIG.
It reaches the state of. At this time, the support shaft 13 pushes the screw 23 of the L-shaped link 19, and the link 19 rotates clockwise in FIG. The operation of the link 19 causes the lever 41 to pivot about the pivot 18a at one end as shown in FIG.
Is pushed down as shown by the imaginary line, the marker head 20 engaged with the tip of the lever 18
Is pressed to the left in FIG. 1 against the elastic force of the spring 27. When the marker head 20 is pressed, the bolt 28, the marker rod 7, the connecting pin 9, and the marker supporting cylinder 2 are pressed.
9. The marker 8 moves to the left via the arm 30, and marking is made at a predetermined position on the ear piece E1 to indicate that screwing is completed. During the tightening operation of the bolt B, the marker support cylinder 29 is prevented from rotating by the positioning projection 31 abutting on the shoulder of the ear piece E1, so that the marking on the ear piece E1 is always performed at a fixed position.

[0012]

Therefore, according to the present invention, the marker 8 is provided outside the ratchet cylinder 5 and is connected to the marker rod 7 with the connecting pin 9 or the like via the axial slit 5b formed in the ratchet cylinder 5, Since the marker 8 is arranged on the side of the head of the bolt B so as to be stamped with the marker 8 on the screwing target of the bolt, a structure in which the marker 8 moves inside a tightening shaft such as the hexagonal shaft 6 cannot be adopted. Marker 9 on Lucky Wrench
Can be attached. In addition, since the marker support tube 29 is connected to the connection pin 9 so as to be slidable about the axis, and the marker support tube 5 is provided with the positioning protruding piece 32 that engages with the side surface of the hanger at the tightening position of the bolt B, It is possible to regulate the position of marking on the hanger by the marker 9 at a fixed position, and it is possible to provide a torque wrench with a marker that is convenient for application to the fastening bolt of the hanger.

[Brief description of the drawings]

FIG. 1 is a front view in which a part of a torque wrench with a marker is cut away.

FIG. 2 is a side view of a torque wrench with a marker.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan view of a main part of the marker driving mechanism.

FIG. 6 is a plan view of a main part of the marker driving mechanism.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Torque wrench with marker 2 Wrench main body 3 Head 4 Handle 5 Ratchet cylinder 5a Ratchet 5b Slit 6 Tightening shaft (hexagonal shaft) 7 Marker rod 8 Marker 9 Connecting pin 10 Marker driving mechanism 11 Toggle link mechanism 12 Tube 13 Support shaft 14 pivot pin 15 toggle receiving arm 16 spring receiver 17 spring 18 lever 19 L-shaped link 20 marker head 21 bracket 22 pivot pin 23 adjustment screw 24 sphere 25 cover 26 marker mechanism 27 spring 28 bolt 29 marker support tube 30 arm 31 cover 32 positioning Projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihide Kishi 2-2-2, Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Noriyuki Tanaka 810 Nakatada, Tamako-cho, Nakakoma-gun, Yamanashi Prefecture Waka Tekki Co., Ltd. Kofu Plant (72) Inventor Motohisa Iguni 6-5-19 Minami Shinagawa, Shinagawa-ku, Tokyo Miwa Tekki Co., Ltd. (72) Takashi Iimuro 1-16 Omori Nishi, Ota-ku, Tokyo No. 5 Inside the Tohnichi Corporation (72) Inventor Shozo Aikawa 1-16-5 Omori Nishi, Ota-ku, Tokyo F-term (Reference) 3C038 AA01 AA02 AA03 BC01 CA03 CA06 CB06 DA02 DA07 EA01 EA06

Claims (3)

[Claims] A wrench main body having a head and a handle, a ratchet cylinder engaged with a ratchet on the head of the wrench main body,
A fastening member fixed to the tip of the ratchet cylinder and capable of engaging with the head of the bolt to be fastened; a marker rod inserted slidably in the ratchet cylinder in the axial direction; and connected to the tip end of the marker rod. Then, the marker rod which can be stamped near the head of the bolt and the toggle link provided in the handle portion of the wrench main body when the predetermined tightening torque is reached, slide the marker rod in the axial direction toward the distal end side. A marker driving mechanism having a marker driving mechanism, wherein the tightening member is a tightening shaft capable of engaging a distal end with an engaging hole of a tightened bolt head, and the marker is a ratchet cylinder. It is provided on the outside and is connected to the marker rod through an axial slit formed in the ratchet cylinder. Marker with a torque wrench, characterized in that it is arranged to seal by location to bolts screwed subject. 2. A marker support tube is slidably inserted around the outer periphery of the ratchet tube, and the marker support tube is connected to the marker rod by a connecting pin passing through an axial slit formed in the ratchet tube. 2. The torque wrench with a marker according to claim 1, wherein the marker is attached to the marker support tube. 3. The threaded object of the bolt is a trolley wire hanger, the marker support cylinder is slidably connected to the connecting pin around an axis, and the marker support cylinder is connected to the marker support cylinder with a bolt. At the tightening position, a positioning protrusion engaging with the side surface of the hanger is provided, and the marker support cylinder rotates relative to the ratchet cylinder during the tightening operation of the bolt, whereby the marking position on the hanger is fixed to a fixed position by the marker. The torque wrench with a marker for a hang-gear fastening bolt according to claim 2, wherein