JP7052492B2 - Tool set - Google Patents

Description

The present invention relates to a tool set.

For example, a fixing device for fixing a work to a workbench is known, such as the clamp device described in Patent Document 1. The fixing device fixes the work in a predetermined position by inserting a pin-shaped member (for example, a knock pin) protruding from the through hole inside the work into the hole of the work. The pin-shaped member is urged in the protruding direction by a spring in the through hole.

Japanese Patent Application Laid-Open No. 2003-266262

For example, the through hole of the fixing device is closed by a lid pressed against the spring. The lid is secured in place within the through hole by a C-ring engaged in a groove in the inner wall defining the through hole.

Since the diameter of the C ring is larger than the diameter of the through hole, in the assembly work of the fixing device, the operator holds the spring in the through hole with the lid with one hand and reduces the diameter of the C ring with the other hand. , It is necessary to push the C ring to the position of the groove in the through hole. In this way, it is difficult to perform the pressing and contracting movements at the same time using both hands, and skillful skills are required. , And the spring may be skipped and the work may be repeated many times.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a tool set capable of easily assembling a fixing device for fixing a work.

The tool set described in the present specification includes a support base that supports the fixing device by holding the tip of a pin protruding from the first through hole in the fixing device for fixing the work, and the inside of the first through hole. The pin is inserted into the first through hole through the central portion of the spring that urges the rear end of the pin and the central hole of the lid that closes the first through hole while the spring is pressed. A guide rod that guides the spring and the lid into the first through hole, and a second through hole that is tapered from one end toward the other end and overlaps with the first through hole so as to communicate with the other end. Is provided, and a C ring that fixes the position of the lid in the first through hole by engaging with a groove portion of the inner wall that defines the first through hole is provided through the second through hole, and the C ring is provided. The guide tool for guiding into the first through hole having a smaller diameter and the C ring are pushed into the second through hole from the one end, and the C is inserted into the first through hole into which the guide rod is inserted. It has a columnar pushing tool that pushes the ring from the other end so as to engage the groove portion, and the pushing tool has an end portion of the guide rod protruding from the fixing device when the C ring is pushed. A storage hole for accommodating is provided , and the second through hole has an inlet side through hole extending from one end and an outlet side through hole extending from the other end, and the diameter of the inlet side through hole is from one end. The diameter of the outlet-side through hole is constant as the diameter of the outlet-side through-hole shrinks toward the boundary between the inlet-side through-hole and the exit-side through-hole. The first portion used for pushing into the inlet side through hole and the C ring pushed into the inlet side through hole are pushed from the inlet side through hole into the outlet side through hole, and further from the outlet side through hole to the first penetration. It has a second portion used for pushing into the hole .

According to the present invention, a fixing device for fixing a work can be easily assembled.

It is a side view which shows an example of the work fixed by the fixing device. It is a figure which shows an example of the fixing device in the spring exchange work. It is a figure which shows an example of the appearance that the fixing device was set on a support base. It is a figure which shows an example of the appearance that a spring and a lid were guided into a through hole by using a guide rod. It is a figure which shows an example of a ring guide. It is a figure which shows an example of how the C ring is pushed into the through hole on the entrance side from the inlet of a ring guide by using a push rod. It is a figure which shows an example of the state of pushing a C ring from an inlet side through hole into an outlet side through hole by using a push rod. It is a figure which shows an example of a state in which a C ring is pushed into a through hole of a knock pin body from an outlet side through hole by using a push rod. In the comparative example, it is a figure which shows the state of pushing the C ring from the through hole on the outlet side into the through hole of a knock pin body by using a push rod.

FIG. 1 is a side view showing an example of a work 91 fixed by the fixing device 1. In FIG. 1, the reference numeral g indicates vertically downward. Examples of the work 91 include, but are not limited to, an engine cylinder block.

A plurality of fixing devices 1 are attached to predetermined positions on the work table 90. The fixing device 1 has a tubular knock pin body 10 having a tapered shape at the tip thereof, and a knock pin 11 having a tip protruding from the knock pin body 10. The tip of the knock pin 11 is inserted into the insertion hole 91a provided in the reference surface 910 at the lower part of the work 91.

As a result, the work 91 is fixed at a predetermined position on the work table 90 by the fixing device 1. Therefore, various processing operations (polishing, etc.) on the work 91 are facilitated.

The knock pin 11 is urged by a spring in the fixing device 1. Therefore, the knock pin 11 is inserted until it hits the back of the insertion hole 91a of the work 91, and can sufficiently support the work 91.

Since the elastic force of the spring in the fixing device 1 decreases due to aged deterioration, it is necessary to replace the spring at an appropriate time. The spring replacement work is performed, for example, with the knock pin 11 facing vertically downward.

FIG. 2 is a diagram showing an example of the fixing device 1 in the replacement work of the spring 13. FIG. 2 shows a cross-sectional view of the fixing device 1 along the vertical direction (see “Fixing device cross section”), a top view of the fixing device 1 (see “Top surface of the fixing device”), and a top view of the lid 14 (“Cover”). A top view of the C-ring (see "Top") and a top view of the C-ring (see "Top of the C-Ring") are shown.

The fixing device 1 has a knock pin body 10, a knock pin 11, a pop-out prevention pin 12, a spring 13, a lid 14, and a C ring 15. The knock pin body 10 is provided with a cylindrical through hole 100 along the vertical direction, and the knock pin 11, the spring 13, the lid 14, and the C ring 15 are provided in the through hole. A groove 101 is formed in the inner wall defining the through hole 100 so as to go around the inner wall. The knock pin 11 is an example of a pin, and the through hole 100 is an example of a first through hole.

The knock pin 11 is located on the tip end side of the knock pin body 10, and the tip end 110 protrudes from the through hole 100. The knock pin 11 has a constricted portion 111 having a smaller diameter than the other portion between the front end 110 and the rear end 112. The rear end 112 of the knock pin 11 is in contact with one end of the spring 13 and is urged by the spring 13 toward the vertically downward g.

The tip 110 of the knock pin 11 is inserted into the support hole 20 of the support base 2. The support base 2 supports the fixing device 1 by holding the tip 110 of the knock pin 11.

The pop-out prevention pin 12 is inserted into the through hole 100 from the side surface of the knock pin body 10 and abuts on the constricted portion 111 of the knock pin 11. The pop-out prevention pin 12 is caught by the rear end 112 of the knock pin 11 pushed out by the spring 13 to prevent the knock pin 11 from popping out of the through hole 100 due to the urging force of the spring 13.

A disk-shaped lid 14 is pressed against the other end of the spring 13. The lid 14 has a large diameter portion 140 and a small diameter portion 141 that overlap each other so that their centers coincide with each other. The diameter Rf of the large diameter portion 140 is larger than the diameter of the small diameter portion 141, and is substantially the same as the diameter Rh of the through hole 100.

The lid 14 is housed in the through hole 100 with the circular surface of the large diameter portion 140 in contact with the spring. Further, the small diameter portion 141 fits into the inner diameter portion 150 of the C ring 15.

The C ring 15 has a diameter Rc larger than the diameter Rh of the through hole 100 and is engaged with the groove portion 101 in a contracted state. The diameter Rs of the groove 101 is larger than the diameter Rh of the through hole 100 and smaller than the diameter Rc of the C ring 15. Therefore, the C ring 15 is fixed in the groove 101 by the restoring force. The lid 14 is urged by the spring 13, and the stepped portion between the large diameter portion 140 and the small diameter portion 141 abuts on the C ring 15 to be fixed at a predetermined position in the through hole 100.

In this way, the C ring 15 fixes the position of the lid 14 by engaging with the groove portion 101, and the lid 14 closes the through hole 100 with the spring 13 pressed.

Since the diameter Rc of the C ring 15 is larger than the diameter Rh of the through hole 100, in the assembly work of the fixing device 1, the operator holds the spring 13 in the through hole 100 with the lid with one hand while holding the spring 13 in the through hole 100 with the other hand. It is necessary to push the C ring to the position of the groove 101 in the through hole 100 while reducing the diameter of the C ring 15. As described above, it is difficult to perform the pressing operation and the contracting operation at the same time, and skillful skill is required. Therefore, an inexperienced operator can use the elastic force of the spring 13 to perform the C ring 15, the lid 14, and The spring 13 may be skipped and the work may be repeated many times.

On the other hand, according to the tool set of the embodiment, the work described below makes it easier to assemble the fixing device 1 than the above work.

FIG. 3 is a diagram showing an example of a state in which the fixing device 1 is set on the support base 2. In FIG. 3, the same reference numerals are given to the configurations common to those in FIG. 2, and the description thereof will be omitted. FIG. 3 shows a cross-sectional view of the fixing device 1 along the vertical direction (see “cross section of the fixing device”) and a top view of the fixing device 1 (see “top surface of the fixing device”).

In the fixing device 1, the tip 110 of the knock pin 11 protruding from the through hole 100a is inserted into the support hole 20 of the support base 2 in a state where the spring 13, the lid 14, and the C ring 15 are taken out from the through hole 100a. Is supported by. The support base 2 is included in the tool set.

The fixing device 1 is provided with a tapered inlet portion 102 at the end of the through hole 100a of the knock pin body 10a as a difference from the example of FIG. The inlet 102 is used for positioning the ring guide as described later. The through hole 100a is an example of the first through hole.

FIG. 4 is a diagram showing an example of how the spring 13 and the lid 14a are guided into the through hole 100a by using the guide rod 3. In FIG. 4, the same reference numerals are given to the configurations common to those in FIGS. 2 and 3, and the description thereof will be omitted. FIG. 4 shows a cross-sectional view of the fixing device 1 along the vertical direction (see “Fixing device cross section”) and a top view of the lid 14a corresponding to the guide rod 3 (see “top surface of the lid”). ..

The guide rod 3 is a rod-shaped tool included in the tool set. The operator passes the guide rod 3 through the center of the spring 13 and the lid 14a and inserts the guide rod 3 into the through hole 100a. The lid 14a is different from the above-mentioned lid 14 in that a central hole 142 for passing the guide rod 3 is provided.

The guide rod 3 guides the spring 13 and the lid 14a into the through hole 100a by being inserted into the through hole 100a while passing through the spring 13 and the lid 14a. Therefore, unlike the case where the spring 13 is manually inserted into the through hole 100a, for example, the posture of the spring 13 is suppressed from being distorted, so that the operator can easily insert the spring 13 into the through hole 100a. can.

Further, since the lid 14a is guided into the through hole 100a while being passed through the guide rod 3, the lid 14a is guided into the through hole 100a while maintaining the radial direction substantially horizontal. Therefore, it becomes easy to engage the C ring 15 with the groove portion 101.

The portion of the guide rod 3 exposed from the through hole 100a is further passed through the through hole of the ring guide that guides the C ring 15.

FIG. 5 is a diagram showing an example of the ring guide 4. FIG. 5 shows a cross-sectional view of the ring guide 4 along the vertical direction (see “ring guide cross section”), a top view of the ring guide 4 (see “ring guide top surface”), and a top view of the C ring 15 (“ring guide top surface”). See "C-ring top surface").

The ring guide 4 is included in the tool set and is an example of a guide tool that guides the C ring 15 into the through hole 100a of the knock pin body 10a. The ring guide 4 is a substantially cylindrical tool, and is provided with an inlet side through hole 40 and an outlet side through hole 41. In the ring guide 4, the C ring 15 is pushed from the inlet 43 into the inlet-side through hole 40, and further from the inlet-side through-hole 40 into the exit-side through-hole 41.

The inlet-side through hole 40 is provided from the inlet 43 of the C ring 15 to the boundary portion 45, and the outlet-side through hole 41 is provided from the boundary portion 45 to the outlet 44 of the C ring 15. The inlet-side through hole 40 is formed in a tapered shape, and its diameter decreases from the inlet 43 toward the boundary portion 45. The diameter Rt of the inlet side through hole 40 at the inlet 43 is larger than the diameter Rc of the C ring 15, and the diameter Rh of the inlet side through hole 40 at the boundary portion 45 coincides with the through hole 100a of the knock pin body 10a. Further, the outlet-side through hole 41 has a constant diameter Rh.

As described above, the inlet side through hole 40 and the outlet side through hole 41 are tapered from the inlet 43 of the C ring 15 toward the outlet 44. Therefore, it is possible to reduce the diameter Rc of the C ring 15 by pushing the C ring 15 into the inlet-side through hole 40. The ring guide 4 guides the reduced C ring 15 to the through hole 100a of the knock pin body 10a via the inlet side through hole 40 and the exit side through hole 41. The inlet side through hole 40 and the outlet side through hole 41 are examples of the second through hole, and the inlet 43 and the outlet 44 are examples of one end and the other end of the second through hole, respectively.

A tapered tip portion 42 is formed on the outer peripheral surface of the ring guide 4 on the outlet 44 side. The shape of the tip portion 42 matches the shape of the inlet portion 102 of the knock pin body 10a. The ring guide 4 is superposed on the knock pin body 10a with the tip portion 42 aligned with the inlet portion 102 of the knock pin body 10a. Therefore, the position of the ring guide 4 with respect to the knock pin body 10a is easily determined.

At this time, the outlet-side through hole 41 is overlapped with the through hole 100a of the knock pin body 10a so as to communicate with the outlet 44. Therefore, the inlet side through hole 40, the outlet side through hole 41, and the through hole 100a of the knock pin body 10a are aligned in a straight line in the vertical direction.

The operator pushes the C ring 15 from the inlet 43 into the inlet side through hole 40 and the outlet side through hole 41 using a push rod, and superimposes the ring guide 4 into which the C ring 15 is pushed on the knock pin body 10a. The operator further pushes the C ring 15 from the outlet side through hole 41 into the through hole 100a of the knock pin body 10a using a push rod. As a result, the C ring 15 is engaged with the groove portion 101 of the through hole 100a.

FIG. 6 is a diagram showing an example of pushing the C ring 15 from the inlet 43 of the ring guide 4 into the inlet-side through hole 40 by using the push rod 5. In FIG. 6, the same reference numerals are given to the configurations common to those in FIG. 5, and the description thereof will be omitted. FIG. 6 shows a cross-sectional view of the ring guide 4 along the vertical direction (see “ring guide cross-section”), a side view of the push rod 5 (see “side surface of the push-in rod”), and a top view of the push-in rod 5. See "Top surface of push rod").

The push rod 5 is included in the tool set and is an example of a columnar push tool. The push rod 5 has a substantially cylindrical large-diameter portion 50 and a small-diameter portion 51. The circular end faces of the large diameter portion 50 and the small diameter portion 51 are formed flat so that the C ring 15 can be pushed in while maintaining the posture of the C ring 15 horizontally. It is desirable that the outer shape of the push rod 5 is circular according to the shapes of the through hole 40 on the inlet side, the through hole 41 on the exit side, and the through hole 100a of the ring guide 4, but the pushing of the C ring 15 is hindered. If not, it may have another shape.

The diameter Ra of the large diameter portion 50 is larger than the diameter Rb of the small diameter portion 51. The large diameter portion 50 is used to push the C ring 15 from the inlet 43 into the inlet side through hole 40, and the small diameter portion 51 pushes the C ring 15 from the inlet side through hole 40 into the exit side through hole 41 and further exits. It is used to push from the side through hole 41 into the through hole 100a of the knock pin body 10a.

Therefore, the length of the small diameter portion 51 in the vertical direction is longer than that of the large diameter portion 50 . Further, the small diameter portion 51 is provided with a storage hole 52 for accommodating the end portion of the guide rod 3 protruding from the knock pin body 10a so that the guide rod 3 does not get in the way when the C ring 15 is pushed in.

The operator sets the C ring 15 near the entrance 43 while keeping the posture of the C ring 15 horizontal. Then, as shown by the arrow Pa, the operator puts the end surface of the large diameter portion 50 of the push rod 5 against the C ring 15 and pushes the C ring 15 to the vicinity of the boundary portion 45. The C ring 15 after being pushed in is shown by a dotted line.

Since the inlet-side through hole 40 is tapered from the inlet 43 toward the outlet 44, the operator can easily reduce the diameter of the C ring 15 simply by pushing the C ring 15. Further, the operator pushes the C ring 15 into the outlet side through hole 41 by using the small diameter portion 51 of the push rod 5.

FIG. 7 is a diagram showing an example of pushing the C ring 15 from the inlet side through hole 40 into the outlet side through hole 41 by using the push rod 5. In FIG. 7, the same reference numerals are given to the configurations common to those in FIG. 6, and the description thereof will be omitted. FIG. 7 shows a sectional view of the ring guide 4 along the vertical direction (see “ring guide cross section”) and a side view of the push rod 5 (see “side surface of the push rod”).

As shown by the arrow Pb, the operator puts the end surface of the small diameter portion 51 of the push rod 5 against the C ring 15 and pushes the reduced C ring 15 into the vicinity of the outlet 44 in the inlet side through hole 40. The C ring 15 after being pushed in is shown by a dotted line.

Next, the operator superimposes the ring guide 4 on which the C ring 15 is pushed near the outlet 44 on the knock pin body 10a, and in that state, the C ring 15 is inserted from the outlet side through hole 41 into the through hole 100a of the knock pin body 10a. Push it in.

FIG. 8 is a diagram showing an example of pushing the C ring 15 from the outlet side through hole 41 into the through hole 100a of the knock pin body 10a using the push rod 5. In FIG. 8, the same reference numerals are given to the configurations common to those in FIG. 7, and the description thereof will be omitted. FIG. 8 shows a cross-sectional view of the fixing device 1 along the vertical direction (see “Fixing device cross section”), a cross-sectional view of the ring guide 4 along the vertical direction (see “Ring guide cross section”), and a push rod 5. A side view of (see "Side of the plumb bob") is shown.

The operator superimposes the ring guide 4 on which the C ring 15 is pushed near the outlet 44 on the knock pin body 10a. At this time, the ring guide 4 is superposed on the knock pin body 10a so that the tip portion 42 thereof fits into the inlet portion 102 of the knock pin body 10a. As a result, the outlet-side through hole 41 overlaps the through hole 100a of the knock pin body 10a in a straight line.

Further, when the ring guide 4 is superposed on the knock pin body 10a, the operator inserts the end portion of the guide rod 3 from which the knock pin body 10a protrudes into the accommodating hole 52 of the push rod 5. Therefore, when the operator pushes the C ring 15 with the push rod 5, the end face of the push rod 5 and the guide rod 3 do not interfere with each other.

The operator puts the end surface of the small diameter portion 51 of the push rod 5 against the C ring 15 and penetrates the outlet side as shown by the arrow Pc while the end portion of the guide rod 3 is accommodated in the accommodation hole 52 of the push rod 5. The C ring 15 reduced in the hole 41 is pushed from the vicinity of the outlet 44 of the ring guide 4 to the through hole 100a of the knock pin body 10a. The spring 13 contracts due to the pushing force of the pushing rod 5, and the C ring 15 moves to the position of the groove 101.

At this time, since the thickness of the C ring 15 is smaller than the width of the groove portion 101 of the through hole 100a, the reduced C ring 15 is engaged with the groove portion 101 by the restoring force thereof. The operator can recognize that the C ring 15 is engaged with the groove portion 101 by the sound at the time of contact between the C ring 15 and the groove portion 101. The C ring 15 engaged with the groove portion 101 is shown by a dotted line.

In this way, the push rod 5 pushes the C ring 15 from the inlet 43 into the inlet side through hole 40, and engages the C ring 15 with the groove portion 101 in the through hole 100a of the knock pin body 10a into which the guide rod 3 is inserted. Push it in from the exit 44 so that it matches. At this time, since the push rod 5 accommodates the end portion of the guide rod 3 protruding from the knock pin body 10a in the accommodation hole 52, the push rod 5 does not interfere with the guide rod 3 when the C ring 15 is pushed in. Further, since the spring 13 is passed through the guide rod 3, its posture is suppressed from being distorted by the pushing force of the pushing rod 5.

As a result, the operator can not only reduce the diameter Rc of the C ring 15 but also reduce the spring 13 by simply pushing the C ring 15 with the push rod 5, so that the C ring 15 can be engaged with the groove portion 101. can. Therefore, the operator does not need to simultaneously perform the operation of suppressing the spring 13 and the operation of contracting the C ring 15 using both hands. Therefore, according to the tool set of this embodiment, the fixing device 1 can be easily assembled.

In this embodiment, as described above, since the tip portion 42 of the ring guide 4 has a tapered shape, the position of the ring guide 4 with respect to the knock pin body 10a can be easily determined. Therefore, the outlet-side through hole 41 can be matched with the through hole 100a of the knock pin body 10a with high accuracy. Therefore, the C ring 15 is pushed into the through hole 100a by the push rod 5 while maintaining a substantially horizontal posture.

FIG. 9 is a diagram showing a state in which the C ring 15 is pushed into the through hole 100a of the knock pin body 10a from the outlet side through hole 41 by using the push rod 5 in the comparative example. In FIG. 9, the same reference numerals are given to the configurations common to those in FIG. 8, and the description thereof will be omitted. 9 shows a cross-sectional view of the fixing device 1 along the vertical direction (see “Fixing device cross section”), a cross-sectional view of the ring guide 4a of the comparative example along the vertical direction (see “Ring guide cross section”), and FIG. A side view of the push rod 5 (see “side view of the push rod”) is shown.

The tip portion 42a of the ring guide 4a of the comparative example has a flat shape instead of a tapered shape. Therefore, it is difficult to position the ring guide 4a, the axis is displaced between the through hole 41 on the outlet side and the through hole 100a of the knock pin body 10a, and the C ring pushed by the push rod 5 as indicated by the reference numeral Pd. The posture of 15 is greatly deviated from the horizontal direction in the through hole 100a. In this case, the C ring 15 cannot be engaged with the groove 101.

Therefore, it is desirable that the tip portion 42 of the ring guide 4a has a tapered shape as in the present embodiment. The means for facilitating the positioning of the ring guide 4a is not limited to the tapered shape of the tip portion 42, and for example, the contact surfaces of the ring guide 4a and the knock pin body 10a are provided with unevenness for positioning. This also makes positioning easier. Further, iron is mentioned as a material for the support base 2, the C ring 15, the lids 14, 14a, the guide rod 3, the push rod 5, the ring guides 4, 4a, the knock pin 11, the knock pin bodies 10, 10a, and the spring 13. Not limited to this.

The embodiments described above are examples of preferred embodiments of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

1 Fixing device 2 Support base 3 Guide rod 4, 4a Ring guide (guide tool)
5 Push rod (push tool)
10,10a Knock pin body 11 Knock pin (pin)
13 Spring 14, 14a Cover 15 C ring 40 Inlet side through hole (second through hole)
41 Exit side through hole (second through hole)
43 Entrance (one end)
44 Exit (the other end)
52 Accommodating hole 91 Work 100, 100a Through hole (first through hole)
101 Groove 142 Center hole

Claims (2)

A support base that supports the fixing device by holding the tip of a pin protruding from the first through hole in the fixing device for fixing the work, and a support base.
The first through hole is formed through the central portion of the spring that urges the rear end of the pin in the first through hole and the central hole of the lid that closes the first through hole while the spring is pressed. A guide rod that guides the spring and the lid into the first through hole by being inserted.
A second through hole that narrows in a taper shape from one end to the other end and is overlapped with the first through hole so as to communicate with the other end is provided and engages with the groove portion of the inner wall that defines the first through hole. A guide tool that guides the C ring that fixes the position of the lid in the first through hole into the first through hole having a diameter smaller than that of the C ring through the second through hole.
A columnar column in which the C ring is pushed into the second through hole from one end thereof, and the C ring is pushed into the first through hole into which the guide rod is inserted from the other end so as to engage the groove portion. Has a push-in tool and
The pushing tool is provided with a housing hole for accommodating an end portion of the guide rod protruding from the fixing device when the C ring is pushed .
The second through hole has an inlet side through hole extending from one end and an outlet side through hole extending from the other end.
The diameter of the inlet-side through-hole is reduced from one end toward the boundary between the inlet-side through-hole and the exit-side through-hole.
The diameter of the outlet-side through hole is constant,
The pushing tool has a first portion used for pushing the C ring from one end into the inlet-side through hole, and the C-ring pushed into the inlet-side through hole from the inlet-side through hole to the outlet. It has a second portion used for pushing into the side through hole and further pushing from the outlet side through hole into the first through hole.
Tool set. The diameter of the first portion is larger than the diameter of the second portion.
The tool set according to claim 1.

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