JP2020110826A - Workpiece holding device - Google Patents

Abstract

To provide a workpiece holding device capable of increasing storage efficiency.SOLUTION: A workpiece holding device for holding a workpiece comprises a plurality of holding mechanisms and a base. The plurality of holding mechanisms are each independent. The workpiece can be held by the plurality of holding mechanisms. The base comprises a plurality of attachment parts for detachably attaching the plurality of holding mechanisms.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a work holding device that holds a work when welding or the like is performed.

When performing processing such as welding on a work, a work holding device that holds the work is used. In such a work holding device, the holding portion that holds the work needs to have a structure and an arrangement that match the shape of the work. Patent Document 1 discloses a configuration including a work holding portion detachably provided on a work holding table so that the holding portion can be easily changed according to the type of work. This work holding part is one in which a plurality of jigs are fixed to a plate material.

JP, 2002-210593, A

A work holding device having a surface plate and a jig fixed to the surface plate as in the conventional art requires a large space for storage. In the configuration of Patent Document 1, although the work holding table can be shared, the work holding portion itself is large, and the space for storage cannot be reduced.

An object of the present disclosure is to provide a work holding device that can improve the storage efficiency.

One aspect of the present disclosure is a work holding device that holds a work, and includes a plurality of holding mechanisms and a base portion. The plurality of holding mechanisms are independent of each other, and the plurality of holding mechanisms are capable of holding the work. The base portion includes a plurality of attachment portions for detachably attaching the plurality of holding mechanisms.

With such a configuration, since the base and the plurality of holding mechanisms are separately configured, the base and the plurality of holding mechanisms can be housed individually. Therefore, it is possible to efficiently store the work holding device, as compared with the case where the work holding device integrally configured is stored.

The plurality of holding mechanisms described above may include a connecting portion and an abutting portion. The connecting portion is configured to be attachable to the plurality of attaching portions. The contact portion is held by the connecting portion and contacts the work. The contact part may be configured to be attachable to and detachable from the connecting part. With such a configuration, each of the plurality of holding mechanisms can be stored by being divided into smaller parts, so that the storage efficiency can be further improved.

The above-mentioned contact portion may be a substantially plate-shaped member. With such a configuration, since the abutting portion is substantially plate-shaped, it is difficult for the contact portion to be bulky during storage, and thus it is possible to suppress an increase in the space required for storage.

The above-mentioned coupling part may have the 1st connection part which is a plate-shaped part. The contact portion may have a second connecting portion that is a plate-shaped portion. The connecting portion and the contact portion may be fixed by stacking and fixing the first connecting portion and the second connecting portion. With such a configuration, since the first connecting portion and the second connecting portion are plate-shaped, it is difficult for the first connecting portion and the second connecting portion to be bulky during storage, and thus it is possible to suppress an increase in space required for storage.

The plurality of mounting portions described above may include a plurality of insertion holes. The plurality of holding mechanisms are insertion portions that can be inserted into the plurality of insertion holes, and when the plurality of holding mechanisms are inserted into the plurality of insertion holes, transition between a non-removable state and a removable state with respect to the plurality of insertion holes. It may be provided with an insert part configured as possible. With such a configuration, the user can easily attach/detach the plurality of holding mechanisms to/from the base portion by operating the insertion portion.

On the above-mentioned base, two or more groups including two or more attachment portions arranged in a straight line at a first interval may be arranged in parallel at a second interval. With such a configuration, the position where the holding mechanism is attached can be freely set. Therefore, for example, even when a plurality of works are held by a plurality of holding mechanisms arranged in different positional relationships, the plurality of works can be held using the base portion.

The work holding device described above may further include a determination device that determines whether or not the positions of the plurality of holding mechanisms on the base are appropriate. With such a configuration, the determination device can determine whether or not the positions of the plurality of holding mechanisms in the base are appropriate, and thus it is possible to prevent the holding mechanisms from being arranged at incorrect positions.

It is a perspective view showing a work holding device of an embodiment. FIG. 2A is a perspective view of a partial cross section showing the periphery of the mounting portion and the fixing portion of the embodiment, and FIG. 2B is a perspective view showing a state where the operation portion is operated in FIG. 2A. It is a top view which shows the base part of embodiment typically. It is a perspective view which shows the connection part of embodiment. It is a perspective view which shows the contact part of embodiment. FIG. 6A is a partial cross-sectional perspective view showing the bush and the button lock clamper of the embodiment, and FIG. 6B is a perspective view showing a state in which the button lock clamper is inserted into the bush in FIG. 6A. It is a perspective view which shows the contact part of a modification.

Embodiments of the present disclosure will be described below with reference to the drawings.
[1. Embodiment]
[1-1. overall structure]
The work holding device 1 shown in FIG. 1 is a device for holding a work 3 for welding or the like. The work holding device 1 includes a base 11 and two holding mechanisms 12A and 12B. Further, the work holding device 1 may include a determination device 5. Since the drawings of the present embodiment schematically show the structure of the work holding device 1, the sizes, numbers, shapes, etc. of the constituent elements are not necessarily accurate, and the drawings are different from each other. In some cases, the number of elements does not exactly match.

The base 11 supports the two holding mechanisms 12A and 12B. The two holding mechanisms 12A and 12B cooperate to hold the work 3. The two holding mechanisms 12A and 12B are attachable to and detachable from the base 11 and are independent of each other. Here, the term "independent" means that the holding mechanism 12A and the holding mechanism 12B can be attached to the base 11 while changing their positional relationship.

[1-2. base]
The base portion 11 is a plate-shaped member whose main portion is made of metal. As shown in FIG. 2A, the base portion 11 is provided with a plurality of mounting portions 21. The plurality of mounting portions 21 are mechanisms for detachably mounting the above-described holding mechanisms 12A and 12B, and have insertion holes 22 as shown in FIG. The insertion hole 22 is a portion into which an insertion portion 53 described later is inserted, and its specific function will be described later.

As shown in FIG. 3, in the base 11, two or more groups 24 including two or more mounting portions 21 arranged in a straight line with a first gap L1 therebetween are arranged with a second gap L2 therebetween. They are arranged in parallel. In this embodiment, the first spacing L1 and the second spacing L2 have the same length, and the mounting portions 21 are arranged in a so-called matrix shape. In FIG. 1, the mounting portion 21 is omitted for the purpose of improving the visibility of the drawing.

[1-3. Holding mechanism]
As shown in FIG. 1, the holding mechanism 12A includes a connecting portion 31A and an abutting portion 32A. The holding mechanism 12B also includes a connecting portion 31B and a contact portion 32B. Hereinafter, the holding mechanism 12A will be described, and the description of the holding mechanism 12B including elements of the same type as the holding mechanism 12A will be omitted.

As shown in FIG. 4, the connecting portion 31A includes a flat plate portion 41, which is a plate-shaped member, and a first connecting portion 42, which is a plate-shaped member that stands upright with respect to the flat plate portion 41. Have.
The flat plate portion 41 is configured to be attachable to the plurality of attachment portions 21 described above. The flat plate portion 41 is provided with four fixing portions 51 arranged at a predetermined interval. As shown in FIG. 2A, the fixed portion 51 has an operation portion 52 that can be rotated by a user and an insertion portion 53 that can be inserted into the insertion hole 22. When the insertion portion 53 is inserted into the plurality of insertion holes 22, the user rotates the operation portion 52 so that the insertion portion 53 can be detached from the plurality of insertion holes 22 and can be detached. Can be transitioned. Then, the user rotates the operation portions 52 of the four fixing portions 51 to put the four insertion portions 53 in a non-removable state, so that the flat plate portion 41 is fixed to the base portion 11 as shown in FIG. 2B. To be done. Note that it is not always necessary to make all four insertion portions 53 non-detachable, and if at least one insertion portion 53 is non-detachable, all four insertion portions 53 are made non-detachable. Although the fixing strength is lower than in the case, the flat plate portion 41 is attached to the base portion 11.

The positions of the four fixing portions 51 on the flat plate portion 41 are determined according to the intervals between the plurality of mounting portions 21 provided on the base portion 11. Therefore, the four insertion portions 53 can be inserted into the insertion holes 22 of the attachment portion 21 at the same time.

As shown in FIG. 4, the first connecting portion 42 is provided with four bushes 56 having through holes 55. In addition, rod-shaped positioning members 57 to 59 that guide the position of the contact portion 32A are arranged in the first connection portion 42 so as to surround the left and right and the lower portion of the bush 56.

As shown in FIG. 5, the contact portion 32A includes a second connecting portion 61 that is a plate-shaped member, and a clamp mechanism 62 that is provided on the second connecting portion 61 and that sandwiches the work 3.
The second connecting portion 61 is provided with four through holes 71 so as to correspond to the above-mentioned four bushes 56. In the state where the first connecting portion 42 and the second connecting portion 61 are overlapped with each other, the button lock clamper 72 shown in FIG. 6A can be inserted into the bush 56 through the through hole 71. The button lock clamper 72 is urged outward by a protrusion 74 protruding from a tip portion 73. Therefore, as shown in FIG. 6B, when the bush 74 is removed, the protrusion 74 is opened outward, and the protrusion 74 is prevented from being locked by the end portion of the bush 56 and coming off. The two connecting portions 61 are fixed. In this way, by overlapping and fixing the first connecting portion 42 and the second connecting portion 61, the connecting portion 31A and the contact portion 32A are fixed. Further, in the button lock clamper 72, when the pressing portion 75 is pressed, the protrusion 74 is lowered inward, and the button lock clamper 72 can be removed from the bush 56. With such a configuration, the contact portion 32A can be attached to and detached from the connecting portion 31A.

As shown in FIG. 1, when the contact portion 32A is attached to the connecting portion 31A, the positioning members 57 to 59 guide the position of the connecting portion 31A, which facilitates the alignment of the bush 56 and the through hole 71. The insertion operation of the button lock clamper 72 becomes simple. Further, when a large load is applied to the connecting portion 31A, a part of the load is received by the contact portion 32A via the positioning members 57 to 59, so that the load applied to the button lock clamper 72 can be reduced.
The clamp mechanism 62 constitutes a clamp mechanism that holds the work by the support portion 77 and the movable portion 78. The clamp mechanism 62 is a portion that contacts the work 3.

[1-4. Judgment device]
The determination device 5 is a device that determines whether or not the positions of the holding mechanism 12A and the holding mechanism 12B in the base 11 are appropriate, and includes a camera 81 and an information processing device 82 in the present embodiment.

As the camera 81, for example, a known CCD image sensor or CMOS image sensor can be used. The camera 81 photographs the upper surface of the base 11, and outputs the photographed image to the information processing device 82.

The information processing device 82 is a computer system. The information processing device 82 determines whether or not the positions of the holding mechanisms 12A and 12B are accurate, using a known technique such as pattern matching or edge detection from the captured image captured by the camera 81. The information processing device 82 can output the determined result to the outside. For example, the information processing device 82 may output a signal that does not permit or stops the work to a device that automatically executes work such as welding. Moreover, you may output the image and sound which give a warning.

The specific method of the determination process using the captured image is not particularly limited, and various known techniques can be applied. For example, the operator may set the information on the accurate positions of the holding mechanism 12A and the holding mechanism 12B, or the position information may be input from the outside of the information processing device 82. Further, the information processing device 82 may automatically identify from the shape of the holding mechanism 12A, 12B that is photographed.

[1-5. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1a) In the work holding device 1, the base 11 and the holding mechanisms 12A and 12B are separately configured, and are configured to be assembled during use. Therefore, when the work holding device 1 is not used, the base 11, the holding mechanism 12A, and the holding mechanism 12B can be individually stored, and the storage can be performed more efficiently than in the case where they are integrally stored. it can.

Further, the base 11 is provided with a plurality of mounting portions 21, and is a highly versatile component that can hold different works by exchanging the holding mechanism to be mounted. Therefore, the base 11 can be a common component corresponding to a plurality of works, and the space for housing the base 11 can be reduced.

(1b) In the work holding device 1, the connecting portion 31A and the contact portion 32A of the holding mechanism 12A are removable, and the connecting portion 31B and the contact portion 32B of the holding mechanism 12B are removable. Therefore, each holding mechanism can be housed in smaller parts, and the housing efficiency can be further improved. Further, by using at least one of the connecting portion and the contact portion as a common component, the total number of components can be reduced.

(1c) In the work holding device 1, both the first connecting portion 42 and the second connecting portion 61 are plate-shaped portions. Therefore, the first connecting portion 42 and the second connecting portion 61 are less likely to be bulky during storage, and thus it is possible to suppress an increase in the space required for storage.

(1d) In the work holding device 1, the user operates the operation portion 52 of the fixing portion 51 to fix the connecting portion 31A to the base portion 11, and the connecting portion 31A can be attached to and detached from the base portion 11. It is possible to transit to any one of a certain state. Therefore, it is possible to easily attach and detach the holding mechanism 12A to and from the base portion 11 without requiring a complicated operation.
Also, the attachment and detachment of the connecting portion 31A and the contact portion 32A can be easily realized by attaching and detaching the button lock clamper 72 to the bush 56.

(1e) Since the base 11 is provided with a plurality of mounting portions 21 in a matrix, the positions at which the holding mechanisms 12A, 12B and the other holding mechanisms are mounted can be freely set. Therefore, the positional relationship between the holding mechanisms 12A and 12B is changed to hold a work other than the work 3, or a plurality of holding mechanisms other than the holding mechanisms 12A and 12B are freely arranged to hold the work other than the work 3. Will be able to. Further, since the base portion 11 has such high versatility, it is not necessary to prepare the base portion 11 for each work 3, and it is possible to suppress an increase in required storage space.

(1f) In the work holding device 1, the determination device 5 can determine whether or not the positions of the two holding mechanisms 12A and 12B in the base portion 11 are appropriate, so that the holding mechanism is arranged at an incorrect position. In addition, it is possible to prevent welding and other work from being performed in the wrong position.

[2. Other Embodiments]
Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above embodiments and can take various forms within the technical scope of the present disclosure.

(2a) In the above embodiment, the work holding device 1 exemplifies a configuration including two holding mechanisms 12A and 12B. However, the work may be held by using three or more holding mechanisms.

(2b) In the above embodiment, the configuration in which the connecting portion 31A and the contact portion 32A that configure the holding mechanism 12A are separate elements has been illustrated, but they may be configured integrally. Further, the holding mechanism may be configured to be separable into three or more elements.

(2c) In the above embodiment, the holding mechanism 12A has the configuration including the clamp mechanism 62. However, the specific configuration and shape of the portion that contacts the work and holds the work is not particularly limited. For example, at least one holding mechanism does not have to include a mechanism for sandwiching a work like a clamp.

Further, it may be a substantially plate-shaped member as a whole, such as the contact portion 91 shown in FIG. 7. By making the contact portion a substantially plate-shaped member, the plurality of contact portions can be compactly stored, and the storage efficiency can be improved.

Further, as a matter of course, the plurality of holding mechanisms attached to the base 11 do not have to have the same configuration, and two or more holding mechanisms may have different configurations, or only some of the holding mechanisms have the same configuration. It may be configured.

(2d) In the above embodiment, a configuration in which the plurality of mounting portions 21 are arranged in a matrix on the base portion 11 has been illustrated. However, the number and the arrangement of the mounting portions 21 are not particularly limited as long as at least one of the holding mechanisms can be mounted. For example, it may be configured such that only a specific holding mechanism can be attached at a predetermined position. Further, both the mounting portions arranged in a matrix and the mounting portions arranged at other positions may be included.

Further, in the base portion 11, since the mounting portions 21 are arranged in a matrix, the positions of the four fixing portions 51 of the holding mechanism, in other words, the positions of the four insertion portions 53 are arranged at the same intervals as the arrangement of the mounting portions 21. By doing so, it was possible to arrange the base 11 at various positions. However, the arrangement of the mounting portions that achieve the above effects is not limited to the configuration of the above embodiment. That is, if there are a plurality of groups of mounting portions that have the same positional relationship as the positional relationship of the plurality of fixed portions included in the holding mechanism, the holding mechanism can be arranged at a plurality of positions.

(2e) The material forming the base of the work holding device and the main part of the holding mechanism is not limited at all. Each of the base portion or each of the connecting portion and the abutting portion forming the holding mechanism can be made of, for example, metal, resin, wood, or the like.

(2f) In the above embodiment, a configuration in which the insertion hole 22 is formed as the attachment portion 21 is illustrated, and a configuration in which the holding mechanism 12A and the like are attached to the base portion 11 by inserting the insertion portion 53 into the insertion hole 22 is illustrated. did. However, the specific structure for removably attaching the holding mechanism to the base is not particularly limited. For example, the holding mechanism may be attached to the base by fixing a nut to the base and fastening with a bolt. Further, for example, the fixing portion is not limited to the structure fixed to the connecting portion 31A, and may be a structure separated from the connecting portion 31A like the button lock clamper 72.

In addition, the mechanism for connecting the contact portion and the connecting portion is not particularly limited, and the configuration using the above-described bolts and nuts may be adopted, or various other configurations can be adopted.
(2g) In the above embodiment, the base 11 having a substantially flat plate shape is illustrated, but the base is not particularly limited in its specific shape as long as it can be attached to a plurality of holding mechanisms. For example, the base portion may have a configuration in which a plurality of block-shaped attachment portions are arranged on a plate-shaped member.

(2h) In the above embodiment, the determination device 5 exemplifies a configuration for processing the image captured by the camera 81 to determine whether the positions of the holding mechanism 12A and the holding mechanism 12B in the base 11 are appropriate. did. However, it may be configured to determine whether the position of the holding mechanism is appropriate by a method other than the above method.

For example, a sensor that detects the connection of the holding mechanism may be provided at the base, and whether the position of the holding mechanism is appropriate may be determined from the output of the sensor. Further, a mechanism for specifying the position of the holding mechanism by energization or communication via the base may be used. The work holding device may not be provided with the determination device.

(2i) The functions of one constituent element in the above-described embodiment may be distributed as a plurality of constituent elements, or the functions of a plurality of constituent elements may be integrated into one constituent element. Moreover, you may omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other above embodiment. It should be noted that all aspects included in the technical idea specified by the wording recited in the claims are embodiments of the present disclosure.

DESCRIPTION OF SYMBOLS 1... Work holding device, 3... Work, 5... Judgment device, 11... Base part, 12A, 12B... Holding mechanism, 21... Attachment part, 22... Insertion hole, 24... Group, 31A, 31B... Coupling part, 32A, 32B. ... abutting portion, 41... flat plate portion, 42... first connecting portion, 51... fixing portion, 52... operating portion, 53... insertion portion, 55... through hole, 56... bush, 57-59... positioning member, 61... Second connection part, 62... Clamping mechanism, 71... Through hole, 72... Button lock clamper, 73... Tip part, 74... Protrusion, 75... Pressing part, 77... Supporting part, 78... Movable part, 81... Camera, 82 ... Information processing device, 91... Contact part

Claims (7)

A work holding device for holding a work,
A plurality of independent holding mechanisms, each of which is configured to hold the work by the plurality of holding mechanisms;
A work holding device, comprising: a base portion having a plurality of attachment portions for detachably attaching the plurality of holding mechanisms. The work holding device according to claim 1,
The plurality of holding mechanisms,
A connecting portion configured to be attachable to the plurality of attaching portions,
A contact portion that is held by the connecting portion and abuts on the workpiece;
The work holding device, wherein the contact portion is configured to be attachable to and detachable from the connecting portion. The work holding device according to claim 2, wherein
The work holding device, wherein the contact portion is a substantially plate-shaped member. The work holding device according to claim 2 or 3, wherein
The connecting portion has a first connecting portion that is a plate-shaped portion,
The contact portion has a second connecting portion which is a plate-shaped portion,
A work holding device in which the connecting portion and the contact portion are fixed by stacking and fixing the first connecting portion and the second connecting portion. The work holding device according to any one of claims 1 to 4,
The plurality of mounting portions include a plurality of insertion holes,
The plurality of holding mechanisms are insertion parts that can be inserted into the plurality of insertion holes, and a state in which the plurality of holding mechanisms cannot be removed from the plurality of insertion holes when the insertion mechanism is inserted into the plurality of insertion holes, and a state in which the plurality of holding mechanisms are removable. And a work holding device including an insertion portion configured to be capable of transiting to and. The work holding device according to any one of claims 1 to 5,
A work holding device in which two or more groups including two or more mounting portions arranged in a straight line at a first distance are arranged in parallel at a second distance in the base portion. The work holding device according to any one of claims 1 to 6,
The work holding device further includes a determination device that determines whether or not the positions of the plurality of holding mechanisms in the base are appropriate.