TWI605891B - Tool pot for chain - Google Patents

Description

Chain tool

The present invention relates to a chain tool for use in an automatic tool changing device provided in a machine tool such as a machining center.

Heretofore, there is known a tool holder for a chain, which is provided with a tool holding unit that detachably holds a tool inside a cylindrical hollow pin, the cylindrical shape The hollow pins alternately connect a pair of inner plates and an outer plate (for example, refer to Patent Document 1).

As such a conventional tool holder for a chain, for example, the chain tool holders 700A to 700C shown in Figs. 6(A) to 6(C) are provided.

Here, FIG. 6(A) is a plan cross-sectional view showing a conventional chain tool holder 700A for holding the tool TA of the MAS standard, and FIG. 6(B) is a view showing a conventional chain for holding the tool TB of the CAT standard. A plan sectional view of the tool holder 700B, and FIG. 6(C) is a plan cross-sectional view showing a conventional chain tool holder 700C for holding the tool TC of the DIN standard.

In addition, in this manual, the composition of the device in the MAS specification is required. The final label "A" of the component, "B" at the end of the component of the CAT-compliant device, and "C" at the end of the component of the DIN-compliant device are described.

The conventional chain tool holders 700A to 700C are provided with tool holding units 720A to 720C that detachably hold the tools TA to TC inside the cylindrical hollow pins 710A to 710C. The cylindrical hollow pins 710A to 710C alternately connect the pair of inner plates C1 and one outer plate C2.

The inner panel C1 and the outer panel C2 are mounted on the outer circumference of the hollow pins 710A to 710C, and are fixed by a fixing ring 750 to prevent falling off.

Here, the tools TA of the MAS standard, the tool TB of the CAT standard, and the tool TC of the DIN standard are shown in FIGS. 5(A) to 5(C) for reference.

The MAS-standard tool TA, the CAT-specific tool TB, and the DIN-specific tool TC include a pull stud portion PA~PC and a shank portion SA~SC.

Further, the tools TA to TC differ in size and shape according to each specification.

The chain tool holders 700A to 700C have tool holding units 720A to 720C having different sizes and shapes according to each specification in the hollow pins 710A to 710C having different sizes according to each specification, and the tool holding units 720A to 720C. Inside the through hole 721, there are a steel ball 722 and a coil spring 723.

The steel ball 722 is biased (energized) toward the center side of the diameter of the hollow pin shafts 710A to 710C by the biasing force (capacity) of the coil spring 723, so that the steel ball 722 holds the tools TA to TC.

Further, the distance PA~PC from the end of the hollow pin shafts 710A to 710C to the center of the steel ball 722 differs depending on each specification.

Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2008-36780

However, the above-described prior chain tool holders 700A to 700C employ a structure in which the tool holding units 720A to 720C and the hollow pin shafts 710A to 710C are relatively fixed by a spring pin 760, and thus the following maintenance is performed. The problem is not only to replace the tool holding unit 720A~720C, but also to replace the hollow pin 710A~710C and disassemble the chain, in order to correspond to the different specifications of the tool TA~TC; the replacement for the different specifications of the tool TA~TC The number of parts is large; or, when the tool holding units 720A to 720C are damaged, it is necessary to replace a complete set of tool holders.

Accordingly, the present invention solves the problems of the prior art as described above, that is, an object of the present invention is to provide a tool holder for a chain that can be disassembled without removing the hollow pin from the inner and outer plates of the chain and disassembling the chain. Compared with the structure of replacing a complete set of tool cylinders, the size of the tool can reduce the number of parts required for replacement of tools of different specifications, so that maintenance can be performed at the minimum necessary.

According to the invention of the first aspect of the invention, a tool holder for a chain includes a tool holding unit that detachably holds a tool inside a cylindrical hollow pin shaft. The cylindrical hollow pin alternately couples a pair of inner plates and a pair of outer plates, wherein the tool holding unit is detachably attached to the hollow pin shaft and has a clamping force for clamping the tool in a radial direction And a plurality of said tool holding units corresponding to different specifications of said tool, said outer diameter of said tool holding unit being uniform between tool holding units corresponding to different specifications of said tool, and clamping members The position in the axial direction of the tool holding unit differs according to each of the different specifications of the tool, so that the tool holding unit side predetermined portion on the outer circumference of the tool holding unit and the hollow pin side of the inner circumference of the hollow pin shaft The predetermined portion is aligned to mount the tool holding unit at a predetermined position within the hollow pin.

According to the invention of the second aspect of the invention, in addition to the configuration of the chain tool holder according to the first aspect of the invention, the above-described problem is solved by the predetermined portion on the tool holding unit side and the predetermined portion on the hollow pin side. In the aligned state, the tool holding unit and the hollow pin are locked by screws inserted from the outer peripheral side of the hollow pin.

According to the invention of the third aspect of the invention, in addition to the structure of the chain tool holder according to the second aspect, the above-mentioned configuration is further solved by the following structure, that is, the screw is a countersunk screw, and the screw on the hollow pin shaft is inserted. The diameter of the through hole becomes larger as it goes toward the outer peripheral side of the hollow pin shaft.

According to the invention of the present invention, in addition to the configuration of the chain tool holder according to any one of the first to third aspects, the above-described problem is solved by the following configuration: a lever, the lock state switching lever is capable of locking and unlocking the holding state of the gripping member, and the protruding amount of the locking portion of the lock state protruding from the tool holding unit is different according to the tool Each of the specifications differs, and the amount of protrusion of the projection of the lock state switching lever from the hollow pin shaft is uniform between the tool holding units corresponding to different specifications of the tool.

A tool holder for a chain according to the present invention includes a tool holding unit that detachably holds a tool inside a cylindrical hollow pin that alternately connects a pair of inner plates and An external board, whereby an automatic tool changing device provided in a machine tool such as a machining center can not only change the position of the tool holding unit by a chain drive to provide a tool of a desired shape, but also can function as follows Unique effect.

According to the chain tool holder of the invention of the first aspect, the tool holding unit is detachably attached to the hollow pin shaft, and has a holding member that grips the tool in the radial direction, and various tools exist corresponding to different specifications of the tool. The holding unit, the outer diameter of the tool holding unit is kept uniform between the tool holding units corresponding to different specifications of the tool, and the position of the holding member in the axial direction of the tool holding unit differs according to each specification of the tool, so that the tool remains Tool holding unit side of the unit periphery The predetermined portion is aligned with a predetermined portion of the hollow pin side of the inner circumference of the hollow pin shaft, thereby mounting the tool holding unit at a predetermined position in the hollow pin shaft, thereby, when using a tool of a different specification from the change before, as long as it is hollow The inside of the pin shaft is removed from the tool holding unit before the change, and the tool holding unit corresponding to the changed other specifications is attached to the inner side of the hollow pin shaft, and a complete set of tool tubes including the hollow pin shaft is not required to be replaced. Therefore, it is not necessary to remove the hollow pin from the inner and outer plates of the chain and disassemble the chain to correspond to tools of different specifications.

That is, since there is interchangeability between the tool holding units corresponding to different specifications of the tool, it is possible to correspond to tools of different specifications.

Further, since only the tool holding unit is replaced without replacing the hollow pin, it is possible to reduce the number of parts required to replace the tool of a different specification than the structure in which a complete set of the tool can be replaced.

Further, in the case where the tool holding unit is broken, it is only necessary to replace the tool holding unit without replacing a complete set of tool holders. Therefore, maintenance such as maintenance can be performed at a minimum necessary level.

That is, it does not waste material resources, and is therefore beneficial to the global environment.

Further, since the number of parts is not increased without changing the outer diameter of the tool cylinder, it is possible to prevent an increase in size of the automatic tool changing device.

According to the chain tool kit of the second aspect of the invention, in addition to the effects of the invention of the first aspect, the predetermined portion of the tool holding unit side is aligned with the predetermined portion of the hollow pin side, and the hollow portion is used. Outer side of the pin The screw is passed to lock the tool holding unit and the hollow pin, whereby the tool holding unit can be moved freely with respect to the hollow pin as long as the screw is removed, so that only the tool holding unit can be easily replaced.

According to the chain tool kit of the invention of claim 3, in addition to the effect of the invention of claim 2, the screw is a countersunk screw, and the diameter of the screw insertion hole on the hollow pin shaft is toward the hollow pin shaft. The outer peripheral side becomes larger, whereby the inlet of the screw insertion hole becomes a taper shape processed by a so-called counterbore, and the head of the countersunk screw does not protrude from the outer peripheral surface of the hollow pin and is hollow The outer peripheral surface of the pin is flush, so that the head of the countersunk screw can be prevented from hooking other objects.

According to the chain tool kit of the invention of claim 4, in addition to the effects of the invention of any one of the first to third aspects, the tool holding unit is provided with a lock state switching lever, and the lock state switching lever can be switched freely. Locking and unlocking the holding state of the gripping member, the protruding amount of the protruding portion of the locking state switching lever protruding from the tool holding unit is different according to each of the different specifications of the tool, and the protruding portion of the locking state switching lever is hollow The amount of protrusion of the pin protrusion is kept uniform between the tool holding units corresponding to different specifications of the tool, whereby the lock state switching lever protrudes from the hollow pin shaft regardless of which type of tool holding unit is mounted in the hollow pin shaft Since the amount of protrusion is the same, regardless of which type of tool holding unit is attached to the hollow pin, the locking of the holding state of the holding member and the unlocking of the lock can be similarly performed.

100, 700, 700A, 700B, 700C‧‧‧ chain tool

110, 710, 710A, 710B, 710C‧‧‧ hollow pin

111‧‧‧screw hole

112‧‧‧ Inner Week Steps

113‧‧‧Outer step

114‧‧‧Slots for fixing rings

120, 120A, 120B, 120C, 720, 720A, 720B, 720C‧‧‧ tool holding unit

121, 721‧‧‧through holes

122, 722‧‧‧ steel ball (clamping parts)

123, 723‧‧‧ (1st) coil spring (clamping parts)

124‧‧‧ Hole Department

125‧‧‧Lock state switch lever

125a‧‧‧ rod projection

125b‧‧‧Great Path Department

125c‧‧‧The Trails Department

126‧‧‧2nd spring

127‧‧‧Sleeve cover

128‧‧‧ (tool holding unit) end

130‧‧‧ countersunk head screws

140‧‧‧Conical sleeve

150, 750‧‧‧ fixed ring

760‧‧ ‧spring pin

C‧‧‧Chain

C1‧‧‧ inner board

C1a‧‧‧ insertion hole

C2‧‧‧outer board

C2a‧‧‧ insertion hole

L, LA~LC‧‧‧ (tool holding unit) outer diameter

M, MA~MC‧‧‧ (tool holding unit) inner diameter

N‧‧‧ (screw through hole) diameter

P, PA~PC‧‧‧ Distance from the end of the hollow pin to the center of the ball / rivet

S, SA~SC‧‧‧ handle

T, TA~TC‧‧ Tools

Fig. 1 is a schematic perspective view of a chain tool bit according to an embodiment of the present invention.

Fig. 2 is a partially cutaway plan view showing a chain tool according to an embodiment of the present invention.

Fig. 3(A) is a side view as seen from the symbol 3A shown in Fig. 2, and Fig. 3(B) is a side view as seen from the symbol 3B shown in Fig. 2.

4(A) is a cross-sectional plan view when the tool holding unit corresponding to the tool of the MAS specification is attached, and FIG. 4(B) is a cross-sectional plan view when the tool holding unit corresponding to the tool of the CAT specification is attached, FIG. (C) is a cross-sectional plan view when the tool holding unit corresponding to the tool of the DIN standard is attached.

Fig. 5(A) is a partial cross-sectional plan view showing the tool of the MAS specification, Fig. 5(B) is a partial cross-sectional plan view showing the tool of the CAT specification, and Fig. 5(C) is a partially cutaway plan view showing the tool of the DIN specification. .

Fig. 6(A) is a plan sectional view showing a conventional chain tool holder for holding a MAS-sized tool, and Fig. 6(B) is a plan sectional view showing a conventional chain tool holder for holding a CAT-size tool. Fig. 6 (C) is a plan sectional view showing a conventional chain tool holder for holding a tool of the DIN standard.

The present invention relates to a chain tool holder, comprising: a tool holding unit that detachably holds a tool inside a cylindrical hollow pin, wherein the cylindrical hollow pins are alternately coupled to each other Board with an outer board, where The tool holding unit is detachably attached to the hollow pin shaft and has a clamping member that grips the tool in the radial direction, and various tool holding units exist corresponding to different specifications of the tool, and the outer diameter of the tool holding unit is in the tool The tool holding units corresponding to different specifications are kept uniform, and the position of the holding member in the axial direction of the tool holding unit differs according to each of the different specifications of the tool, so that the tool holding unit side of the tool holding unit has a predetermined portion and a hollow pin. The predetermined portion of the hollow pin side of the inner circumference is aligned, thereby mounting the tool holding unit at a predetermined position in the hollow pin shaft, thereby eliminating the need to remove the hollow pin shaft from the inner and outer plates of the chain and disassemble the chain. Different specifications of the tool, in addition to the replacement of a complete set of tool barrels, can reduce the number of parts required to replace the tool with different specifications, so that maintenance can be performed at the minimum necessary, as long as this The invention is a device as described above, and its specific embodiment may be anyway.

For example, the gripping member may be a member that presses a ball, abuts against the handle of the tool to hold the tool, and may also be a pull of the gripping claw or the ball against the front end of the handle of the tool. The outer circumference of the nail portion holds the components of the tool.

Further, any one may be provided as long as the lock mechanism is provided, and the lock mechanism freely locks and unlocks the holding state of the clamp member.

Example

Hereinafter, a chain tool cylinder 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 (C), 5 (B), and 5 (C).

As shown in FIGS. 1 to 3(A) and 3(B), the chain tool holder 100 of the present invention includes a tool holding unit 120, which is a tool holding unit 120. The tool T is detachably held inside the cylindrical hollow pin 110, and the cylindrical hollow pin 110 alternately connects the pair of the inner plate C1 and the outer plate C2.

Specifically, the chain C has a pair of inner plates C1 spaced apart in the left-right width direction with respect to the longitudinal direction of the chain, a pair of outer plates C2 disposed on the left and right outer sides of the pair of inner plates C1, and a hollow pin 110 .

Both sides of the hollow pin 110 are inserted into the insertion hole C1a of the inner panel C1 and the insertion hole C2a of the outer panel C2, and the fixing ring 150 is attached to the fixing groove portion 114.

The inner panel C1 and the outer panel C2 are positioned between the outer circumferential step portion 113 of the hollow pin 110 and the fixing ring 150 in the left-right width direction, and at least one of them is swingably mounted with respect to the hollow pin shaft 110.

Further, the tool holding unit 120 includes a holding member that holds the tool T in the radial direction.

As an example, the holding member includes the steel ball 122 and the first coil spring 123.

The steel ball 122 and the first coil spring 123 are disposed inside the through hole 121 of the tool holding unit 120, and the steel ball 122 is biased toward the center side in the radial direction of the tool holding unit 120 by the first coil spring 123 (energization) .

Here, the diameter of the through hole 121 is set to be smaller than the diameter of the steel ball 122 at the center side end portion of the tool holding unit 120 in the radial direction.

Further, a cylindrical sleeve-like cover 127 is disposed on the outer peripheral side of the tool holding unit 120, and the first coil spring 123 is prevented from flying out of the through hole 121 by covering the through hole 121.

When the tool T enters the chain tool holder 100, the nail portion P of the tool T The large diameter portion of the front end side of (PA~PC) overcomes the biasing force (capacity) of the first coil spring 123 to move the steel ball 122.

Further, when the large diameter portion of the shank portion P (PA~PC) passes and the small diameter portion faces, the steel ball 122 faces the radial direction of the tool holding unit 120 by the biasing force (capacity) of the first coil spring 123. The center side moves to grip the small diameter portion of the nail portion P (PA~PC).

On the other hand, when the tool T is taken out from the chain tool holder 100, the large-diameter portion on the distal end side of the nail portion P (PA to PC) of the tool T overcomes the biasing force (capacity) of the first coil spring 123. The steel ball 122 moves.

Further, when the large diameter portion of the tip end side of the nugget portion P (PA to PC) passes, the grip state of the tool holding unit 120 holding the tool T is released.

Further, in the present embodiment, four steel balls 122 are disposed, but the steel balls 122 may be three or more.

Further, on the opposite side of the hollow pin 110 to the side on which the tool holding unit 120 is disposed, a tapered sleeve that is in contact with the shank S (SA to SC) of the tool T is disposed (taper sleeve) ) 140.

Moreover, the tool holding unit 120 is detachably attached to the hollow pin shaft 110.

Further, as shown in FIGS. 4(A) to 4(C), the tool holding units 120A to 120C are various in accordance with different specifications of the tools TA to TC.

For example, as a reference, there are the tool TA of the MAS specification of FIG. 5(A), the tool TB of the CAT (ANSI) specification of FIG. 5(B), and the DIN gauge of FIG. 5(C). The grid tool TC these three.

Further, in the present embodiment, "A" is indicated at the end of the constituent elements of the device of the MAS standard, "B" is indicated at the end of the constituent elements of the device of the CAT (ANSI) standard, and the constituent elements of the device of the DIN standard are required as needed. The final label "C" is used for explanation.

In the present embodiment, the three types of tools TA to TC include the tool holding unit 120A corresponding to the MAS standard of FIG. 4(A) and the tool holding unit 120B corresponding to the CAT (ANSI) standard of FIG. 4(B). There are three types of tool holding units 120C corresponding to the DIN specifications of Fig. 4(C).

Further, the outer diameters LA to LC of the tool holding units 120A to 120C are unified between the tool holding units 120A to 120C corresponding to the different specifications of the tools TA to TC.

On the other hand, as an example, the inner diameters MA to MC of the tool holding units 120A to 120C are different between the tool holding units 120A to 120C corresponding to the different specifications of the tools TA to TC.

Further, the position of the steel ball 122, which is a holding member, in the axial direction of the tool holding units 120A to 120C differs depending on each of the different specifications of the tools TA to TC.

Further, the end portion 128 which is a predetermined portion on the tool holding unit side of the outer periphery of the tool holding unit 120A to 120C is aligned with the inner circumferential step portion 112 which is a predetermined portion of the hollow pin side of the inner circumference of the hollow pin shaft 110, thereby holding the tool holding unit. The 120A to 120C are mounted at predetermined positions in the hollow pin 110.

Thereby, as shown in FIG. 4(A) to FIG. 4(C), from the hollow pin 110A The distance PA~PC from the end of the ~110C to the center of the steel ball 122 is the same as the previous structure, and varies depending on each specification.

On the premise of this, when the tool TB of a different specification from that before the change is used, for example, the tool holding unit 120A before the change is removed from the inner side of the hollow pin 110, and for example, the tool holding unit corresponding to the other specifications after the change is used. The 120B can be mounted to the inside of the hollow pin 110 without the need to replace a complete set of tool barrels including the hollow pin 110.

That is, it is interchangeable between the tool holding units 120A to 120C corresponding to different specifications of the tools TA to TC.

Further, only the tool holding units 120A to 120C are replaced without replacing the hollow pin 110.

Further, if the tool holding units 120A to 120C are damaged, it is only necessary to replace the tool holding units 120A to 120C without replacing a complete set of tool holders.

That is, there is no waste of material resources.

Further, the outer diameter of the chain tool holder 100 is not changed, and the number of parts is not increased.

Further, in the present embodiment, the end portion 128 which is a predetermined portion on the tool holding unit side is aligned with the inner circumferential step portion 112 which is a predetermined portion on the hollow pin side, and is inserted from the outer peripheral side of the hollow pin shaft 110. An example of a screw that passes through is a countersunk screw 130 to lock the tool holding units 120A-120C and the hollow pin shaft 110.

Thus, as long as the countersunk screw 130 is removed, the tool holding unit 120A~ The 120C is movable relative to the hollow pin 110.

Moreover, the diameter N of the screw insertion hole 111 on the hollow pin 110 becomes larger toward the outer peripheral side of the hollow pin shaft 110.

Thereby, the inlet of the screw insertion hole 111 is tapered by a so-called counterbore, and the head of the countersunk screw 130 does not protrude from the outer peripheral surface of the hollow pin 110 and the outer peripheral surface of the hollow pin 110. Qi Ping.

Further, in the present embodiment, a lock mechanism that locks and unlocks the holding state of the gripping member is provided in a slidable manner.

Specifically, the lock state switching lever 125 and the second coil spring 126 are disposed in the hole portion 124 of the tool holding units 120A to 120C.

Further, a part of the lock state switching lever 125, that is, the lever protrusion 125a protrudes from the hole portion 124 of the tool holding units 120A to 120C, and the lock state switching lever 125 is protruded toward the protrusion by the biasing force of the second coil spring 126. Directional bias (energization).

In a state where no object abuts against the rod projection 125a, the large diameter portion 125b of the lock state switching lever 125 comes into contact with one steel ball 122, and the steel ball 122 does not move.

That is, it is locked in a state of being held by the holding member.

On the other hand, when the member (not shown) abuts against the lever protrusion 125a and presses the lock state switching lever 125 against the biasing force of the second coil spring 126, the large-diameter portion of the lock state switching lever 125 is locked. The small diameter portion 125c of the locking state cutting lever 125 is opposed to the through hole 121 by the through hole 121.

Then, one steel ball 122 is movable in the through hole 121 toward the outer peripheral side of the tool holding units 120A to 120C.

That is, the lock is released.

Further, the amount of protrusion of the protruding portion of the lock state switching lever 125 that protrudes from the tool holding units 120A to 120C, that is, the rod protruding portion 125a differs depending on each of the different specifications of the tools TA to TC.

Further, the amount of protrusion of the rod protruding portion 125a of the lock state switching lever 125 from the hollow pin shaft 110 is kept uniform between the tool holding units 120A to 120C corresponding to the different specifications of the tools TA to TC.

Thereby, regardless of which type of tool holding units 120A to 120C are attached to the hollow pin 110, the amount of protrusion of the lock state switching lever 125 from the hollow pin shaft 110 is the same.

In the chain tool cylinder 100 of the embodiment of the present invention obtained in this manner, the tool holding units 120A to 120C are detachably attached to the hollow pin shaft 110, and are provided with gripping members for holding the tools TA to TC in the radial direction. The steel ball 122 and the first coil spring 123, and various tool holding units exist corresponding to different specifications of the tools TA~TC, and the outer diameters LA~LC of the tool holding units 120A to 120C are different from those of the tool TA~TC. The corresponding tool holding units 120A to 120C are kept uniform, and the positions of the steel balls 122 and the first coil springs 123 in the axial direction of the tool holding units 120A to 120C differ according to each of the different specifications of the tools TA to TC, so that the tools are held. The inner peripheral step portion 112 which is a predetermined portion of the outer circumference of the tool holding unit side, that is, the end portion 128 and the inner side of the hollow pin shaft 110, that is, the hollow portion on the outer circumference of the unit 120A to 120C. By aligning, the tool holding units 120A to 120C are attached to predetermined positions in the hollow pin 110, whereby the hollow pin 110 can be detached from the inner plate C1 and the outer plate C2 of the chain C and the chain C can be disassembled. TA~TC, a tool of different specifications, can reduce the number of parts required to replace the tool TA~TC with different specifications compared to the structure of a complete set of tool holders, and can perform maintenance such as maintenance with minimum necessary maintenance. It can prevent the size of the automatic tool changing device from increasing.

Further, in a state in which the end portion 128 which is a predetermined portion on the tool holding unit side and the inner circumferential step portion 112 which is a predetermined portion on the hollow pin side, the screw inserted from the outer peripheral side of the hollow pin shaft 110 is used. The head screw 130 locks the tool holding units 120A to 120C and the hollow pin 110, whereby the tool holding units 120A to 120C can be easily replaced.

Further, the screw is a countersunk screw 130, and the diameter N of the screw insertion hole 111 on the hollow pin shaft 110 becomes larger toward the outer peripheral side of the hollow pin shaft 110, whereby the head hook of the countersunk screw 130 can be prevented. To other objects.

Further, the tool holding units 120A to 120C include a lock state switching lever 125 that locks and unlocks the holding state of the gripping member, and locks the lever from the tool holding units 120A to 120C. The protrusion amount of the protrusion portion 125, that is, the protrusion amount of the rod protrusion portion 125a differs according to each of the different specifications of the tool TA~TC, and the protrusion amount of the rod protrusion portion 125a of the lock state switching lever 125 protrudes from the hollow pin shaft 110, in the tool The tool holding units 120A to 120C corresponding to different specifications of the TA~TC are uniformly unified, and thus the effect is very large, for example, regardless of which type of tool holding unit 120A to 120C is mounted to the hollow. In the pin 110, the locking and unlocking of the holding state of the steel ball 122 and the first coil spring 123 can be similarly performed.

112‧‧‧ Inner Week Steps

120A‧‧‧Tool holding unit

121‧‧‧through holes

122‧‧‧ steel ball (clamping parts)

123‧‧‧(1) coil spring (clamping part)

124‧‧‧ Hole Department

125‧‧‧Lock state switch lever

125a‧‧‧ rod projection

125b‧‧‧Great Path Department

125c‧‧‧The Trails Department

126‧‧‧2nd spring

127‧‧‧Sleeve cover

128‧‧‧ (tool holding unit) end

130‧‧‧ countersunk head screws

140‧‧‧Conical sleeve

150‧‧‧Fixed ring

C1‧‧‧ inner board

C2‧‧‧outer board

LA‧‧‧ (tool holding unit) outer diameter

MA‧‧‧ (tool holding unit) inner diameter

N‧‧‧ (screw through hole) diameter

PA‧‧‧Distance/nailing from the end of the hollow pin to the center of the ball

TA‧‧‧ tools

Claims (3)

A tool holder for a chain, comprising: a tool holding unit that detachably holds a tool inside a cylindrical hollow pin, the cylindrical hollow pin alternately connecting a pair of inner plates and a The outer plate, the chain tool holder is characterized in that the tool holding unit is detachably attached to the hollow pin shaft, and has a clamping member that grips the tool in a radial direction, and corresponds to the There are a plurality of the tool holding units of different sizes of the tool, the outer diameter of the tool holding unit being uniform between the tool holding units corresponding to different specifications of the tool, and the holding member is in the tool holding unit The position in the axial direction is different according to each of the different specifications of the tool, so that the predetermined portion of the tool holding unit side of the outer periphery of the tool holding unit is aligned with the predetermined portion of the hollow pin side of the inner circumference of the hollow pin. Thereby mounting the tool holding unit at a predetermined position in the hollow pin, wherein the tool holding unit is provided with a locking state switching lever, the locking shape The switching lever can switch and unlock the holding state of the clamping member freely, and the protruding amount of the protruding portion of the locking state switching lever protruding from the tool holding unit is different according to each specification of the tool Differently, the protruding amount of the protruding portion of the locking state switching lever protruding from the hollow pin shaft is uniform between the tool holding units corresponding to different specifications of the tool. The tool kit for a chain according to claim 1, wherein The tool holding unit is locked with the screw inserted from the outer peripheral side of the hollow pin shaft in a state where the predetermined portion of the tool holding unit side is aligned with the predetermined portion of the hollow pin side. Hollow pin. The tool kit for a chain according to claim 2, wherein the screw is a countersunk screw, and a diameter of a screw insertion hole on the hollow pin shaft is toward an outer peripheral side of the hollow pin shaft. Become bigger.