JP3005626U - Caster for traveling - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a traveling caster that can be assembled easily and easily and can be reduced in weight and improved in durability. [Structure] A running roller 4 made of synthetic rubber is housed in a roller housing portion 3 of a caster body 2 made of synthetic resin, and bearing holes 5a formed in left and right wall portions of the roller housing portion,
5b and the insertion hole 4a formed in the traveling roller are communicated with each other, and then the tip portion of the shaft 6 is forced against the bearing hole in the left side wall portion through the bearing hole in the right side wall portion and the insertion hole in the traveling roller. The bearing groove on the side wall and the locking groove 6 on the shaft.
Since d and M are made to coincide with each other so as not to be pulled out and fixed, the work of assembling the traveling caster can be performed easily and easily, and the workability can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a caster for traveling, which is attached to open and close a gate installed at an entrance or exit of a garage or entrance, or to move furniture such as a chair or a desk.

[0002]

[Prior art]

 Conventionally, as a traveling caster used for the above-mentioned example, for example, a traveling roller is housed in a lower housing portion of a caster main body, and bearing holes formed in left and right wall portions of the housing portion and traveling rollers. After communicating with the insertion hole formed in the roller, insert the shaft through the bearing hole formed on one wall side, and project the shaft outside the bearing hole formed on the other wall side. Engage parts such as the retaining ring and retaining pin with the protruding shaft to prevent retaining. Alternatively, there is an assembling method in which the protruding end of the shaft is caulked to prevent the shaft from coming off.

[0003]

[Problems to be solved by the device]

 However, as mentioned above, when engaging parts such as the retaining ring and retaining pin with the protruding side shaft part of the shaft, or when caulking to the size where the protruding side end part of the shaft is retained. However, not only is it time-consuming and time-consuming to remove the shaft, but there is also the problem of poor workability due to the large number of assembly steps and parts.

In addition, when the shaft is retained by a metal component such as a retaining ring or a retaining pin, the weight of the caster is increased by the number of components, and the total weight of the caster is concentrated on the grounding portion of the traveling roller. As a result, the running roller is worn out in a short period of time, which shortens the service life.

In view of the above problems, the present invention inserts a support shaft from one side into each bearing hole of both side wall portions forming the caster body and locks and fixes it, so that the assembling work can be performed easily and easily. At the same time, it is an object of the present invention to provide a traveling caster capable of improving workability by reducing the number of assembling steps and assembling parts.

[0006]

[Means for Solving the Problems]

 In the traveling caster according to claim 1, each bearing hole for inserting the support shaft in the axial direction is formed in both side wall portions of the housing portion, and one bearing hole side is slightly smaller than the shaft portion of the support shaft. It is characterized in that it is formed to have a small diameter, and an engaging groove that engages with the bearing hole of the wall portion is formed on the tip side shaft peripheral surface of the support shaft inserted into the one bearing hole side.

A support shaft according to a second aspect of the present invention is, in addition to the structure according to the first aspect, a front end of the support shaft in a direction in which a front end portion of the support shaft is inserted into the one bearing hole side. The feature is that the part is formed in a tapered shape.

A support shaft according to a third aspect of the present invention is, in addition to the structure according to the first aspect, a front end of the support shaft in a direction in which a front end portion of the support shaft is inserted into the one bearing hole side. It is characterized in that the part is divided into a plurality of parts.

The traveling caster according to claim 4 is, in addition to the configuration according to claim 1, characterized in that a bearing hole formed in one sidewall portion of the above-mentioned storage portion is a center, and an outer surface side central portion of the wall portion. A fitting recess for fitting and fixing the lid is formed in the fitting recess, and a locking piece and a locking hole for locking each other are formed in the peripheral edge of the fitting recess and the lid facing each other, and the locking is provided. The supporting piece is divided into left and right parts with respect to the inserting direction, and the engaging piece is divided into left and right parts. The feature is that each retaining claw that is locked in the direction is formed.

According to a fifth aspect of the present invention, the traveling caster has a fitting recess for fitting and fixing a lid body at a central portion on an outer surface side of the wall portion with a bearing hole formed in one side wall portion as a center. And a locking projection and a locking recess that engage with each other at the opposing peripheral edge of the fitting recess and the lid body.

[0011]

[Action]

 In the traveling caster according to claim 1, the traveling wheel is housed in a housing portion that constitutes the caster body, and the bearing holes formed in both side wall portions of the housing portion are communicated with the insertion holes formed in the traveling wheel. After that, the tip of the support shaft is forcibly inserted into the bearing hole formed on the other wall side through the bearing hole formed on the one wall side, and the engagement between the bearing hole on the side wall and the support shaft is performed. Since the retaining groove and the retaining groove are made to coincide with each other so as not to be pulled out and fixed, the assembling work can be easily performed.

The support shaft according to a second aspect of the invention, together with the action of the first aspect of the invention, is provided on the other wall side through a bearing hole formed on one wall side of the caster body. Since the tapered side of the support shaft is inserted into the formed bearing hole, the support shaft can be easily inserted.

The support shaft according to a third aspect of the invention, together with the action of the first aspect of the invention, extends to the other wall side through a bearing hole formed in one wall side of the caster body. The tip of the support shaft is forcibly inserted into the formed bearing hole, and the tip of the support shaft is reduced in diameter so that it can be inserted into the bearing hole of the same side wall. Easy to insert.

In the traveling caster according to a fourth aspect of the present invention, in addition to the operation of the first aspect, the lid body is fitted into the fitting concave portion of the wall portion forming the caster main body, and the fitting concave portion and the lid are provided. The engaging piece and the engaging hole formed on the peripheral edge portion facing the body are engaged with each other. In other words, each support piece of the locking piece is elastically deformed in the circumferential direction and inserted into a width that is allowed to be inserted into the locking hole. Since the and the insertion side edge of the locking hole are circumferentially locked and fitted and fixed, the end of the support shaft can be surely hidden by the lid.

In the traveling caster according to a fifth aspect, in addition to the operation according to the first aspect, the lid body is fitted into the fitting recess of the wall portion that constitutes the caster main body, and the fitting recess and the lid are provided. Since the locking concave portion and the locking convex portion formed on the peripheral edge portion facing the body are engaged with and fixed to each other, the end portion of the support shaft can be surely hidden by the lid.

[0016]

[Effect of device]

 According to this invention, since the support shaft is inserted from one side into the bearing holes of both side wall portions constituting the caster main body to prevent the retainer from being fixed, the entire caster can be assembled easily and easily. Since it is not necessary to assemble parts such as retaining rings and retaining pins as in the conventional example or caulking the protruding side shaft part of the support shaft, the number of assembling steps and assembling parts are reduced. Therefore, the workability can be improved.

Moreover, without using metal parts such as the retaining ring and retaining pin, only the support shaft is inserted and retained and fixed, so it is lighter than the conventional casters, and the entire caster is lightweight. In addition, the load applied to the ground contact portion of the traveling wheel is reduced, so that the traveling wheel is less worn, the life is extended, and the durability is improved.

Further, after the support shaft is inserted and fixed, the lid is fitted and fixed in the fitting recess of the wall portion forming the caster body, so that the support shaft inserted in the bearing hole of the fitting recess. The end of the can be securely covered with the lid, and it is possible to prevent dirt and dust from adhering to the support shaft during traveling.

[0019]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show a traveling caster attached to open and close a garage gate. In FIGS. 1 and 2, the traveling caster 1 is a roller accommodating portion 3 of a caster body 2 made of synthetic resin. The running roller 4 made of synthetic rubber is rotatably housed therein, and the bearing holes 5a and 5b formed in the left and right wall parts 5 and 5 of the roller housing part 3 and the center of rotation of the running roller 4 are formed. A metal shaft 6 is inserted through the insertion hole 4a to rotatably support the traveling roller 4 housed in the roller housing portion 3. Further, the synthetic resin caps 7 and 7 are fitted and fixed in the fitting recesses 5c and 5c formed in the center surfaces of the left and right wall parts 5 and 5, respectively.

The caster body 2 described above forms a roller storage part 3 for storing the traveling roller 4 by opening the entire lower surface of the caster body 2, and the left and right wall parts 5, 5 of the roller storage part 3 are formed. 5, the bearing holes 5a and 5b for inserting the shaft 6 are formed so as to penetrate in the axial direction, and the bearing hole 5a of the right side wall portion 5 has a slightly larger diameter than the shaft portion 6a of the shaft 6 and is coaxial. The head portion 6b formed on the base end side of the portion 6a is formed in a shape and dimension that can be locked.

Further, as shown in FIG. 5, the bearing hole 5b of the left side wall portion 5 has a slightly smaller diameter than the shaft portion 6a of the shaft 6, and a tip portion 6c formed on the tip side of the coaxial portion 6a is engaged. In addition to being formed in a shape and size to be stopped, it is formed in a hole shape that is fitted and fixed to a locking groove 6d formed on the tip side shaft peripheral surface of the coaxial portion 6a. Further, the tip portion 6c constituting the shaft 6 is formed in a conical or spherical shape that is tapered in the inserting direction, so that the inserting operation of the shaft 6 into the bearing hole 5b of the left side wall portion 5 is facilitated.

Further, as shown in FIG. 6, for example, one or two or more split grooves 6e may be formed in the axial direction on the tip side of the shaft portion 6a constituting the shaft 6, and the left side wall portion 5 Since the tip portion 6c of the shaft 6 is forcibly reduced in diameter and inserted into the bearing hole 5b, the shaft 6 can be easily inserted.

In addition, an insertion portion 8 is formed in the vertical direction on the rear upper peripheral surface of the caster body 2, and an insertion hole 8a for inserting a metal mounting shaft 9 is formed at the center of the upper surface side of the insertion portion 8. Is forming. That is, when the lower end side of the mounting shaft 9 is vertically inserted into the insertion hole 8a of the insertion portion 8, the annular locking projection 8b formed on the inner peripheral surface of the lower end side of the insertion hole 8a and the same attachment The shaft 9 has a ring-shaped locking recess 9a formed on the outer peripheral surface of the lower end of the shaft 9 to engage and prevent the shaft 9 from protruding, and a protrusion 8c formed at the bottom center of the insertion hole 8a. The bearing abuts on the surface so as to be freely rotatable.

Further, a screw portion 9b for screwing into a mounting frame 11 of the gate 10 described later is threaded on the outer peripheral surface of the upper end portion of the mounting shaft 9 described above, and is rotated on the outer peripheral surface of the intermediate portion of the mounting shaft 9. A nut portion 9c for operating is formed.

As shown in FIG. 7, the caps 7, 7 described above are fitted and fixed to the fitting recess 5 c of the wall 5 by the first fitting structure. That is, the caps 7 and 7 are formed in a shape and size that are fitted and fixed to the fitting recesses 5c and 5c of the wall parts 5 and 5, and the outer peripheral portions of the caps 7 and 7 are, for example, Two or three or more locking pieces 7a ... Are formed at appropriate intervals in the circumferential direction, and the wall portion 5 is fitted so as to face each locking piece 7a. For example, two or three or more insertion holes 5d ... Are formed in the inner peripheral edge of the recess 5c.

Each of the above-mentioned locking pieces 7a ... Is divided into left and right by forming a split groove 7b in the inserting direction in the center part on the tip side of the same locking piece 7a, and is also divided into left and right support pieces 7c, 7c. Retaining claws 7d, 7d are formed at the end portion on the insertion side. That is, when inserting the locking pieces 7a of the cap 7 into the locking holes 5d of the fitting recess 5c formed in the wall 5, the locking pieces 5a of the fitting recess 5c are inserted into the locking holes 5d of the same. Each supporting piece 7c, 7c of each locking piece 7a is forcibly deformed and inserted into an allowable lateral width, and each supporting piece 7c, 7c is pulled out at the inner edge of the locking hole 5d. Covering the head portion 6b and the tip portion 6c of the shaft 6 inserted and fixed in the left and right wall portions 5 and 5 with the caps 7 and 7 by locking and locking the stopper claws 7d and 7d. You can

Assuming that the illustrated embodiment is configured as described above, a method of assembling the traveling caster 1 will be described below. First, as shown in FIG. 3, the traveling roller 4 formed of synthetic rubber is accommodated from below in the roller accommodating portion 3 of the caster body 2 formed of synthetic resin, and the left and right wall portions 5, 5 of the roller accommodating portion 3 are accommodated. The bearing holes 5a, 5a formed in 5 and the insertion hole 4a formed in the running roller 4 communicate with each other. After that, a metal shaft 6 is axially inserted from the side of the bearing hole 5a formed in the right side wall portion 5, and the shaft 6 is inserted into the bearing hole 5b formed in the left side wall portion 5 through the insertion hole 4a of the traveling roller 4. The tip portion 6c of the above is forcibly inserted and fixed to prevent it from being pulled out.

That is, the tip portion 6c of the shaft 6 is projected to the outside of the bearing hole 5b of the left side wall portion 5 so that the bearing hole 5b of the same side wall portion 5 and the locking groove 6d of the shaft 6 are aligned and fixed to each other. Since the head portion 6b of the shaft 6 is locked in the bearing hole 5a of the right side wall portion 5 and the tip portion 6c of the shaft 6 is locked in the bearing hole 5b of the left side wall portion 5, the shaft 6 is It can be securely fixed by just inserting it. Moreover, since the tip portion 6c of the shaft 6 is formed into a conical shape or a spherical shape, the shaft 6 can be easily inserted into the bearing hole 5b of the left side wall portion 5.

Next, the respective caps 7, 7 are fitted into the respective fitting recesses 5c, 5c formed in the respective wall parts 5, 5, and the caps 7 are fitted into the respective engaging holes 5d of the fitting recess 5c. The respective locking pieces 7a of ... are forcibly inserted into the respective locking holes 5d, and the retaining claws 7d and 7d of the respective retaining pieces 7a are locked into the respective locking holes 5d. The head portion 6b and the tip portion 6c of 6 can be covered with the respective caps 7, 7. Further, before or after the traveling roller 4 is assembled, the mounting shaft 9 is inserted and fixed in the insertion portion 8 of the caster body 2 so as to be freely rotatable, so that as shown in FIG. Assembly work is completed.

Next, as shown in FIG. 11, when the traveling casters 1 assembled as described above are mounted on the mounting frame 11 of the gate 10, the mounting frames 11 ... Then, the threaded portion 9b of the mounting shaft 9 inserted and fixed to the traveling caster 1 is screwed and fixed from below. When the gate 10 is opened and closed, the respective casters 1 ... Rotate 360 degrees in any direction, so that the gate 10 can be easily opened and closed.

As described above, the shaft 6 is inserted into one of the bearing holes 5a and 5b of the left and right wall portions 5 and 5 that form the caster body 2 from one side to prevent the shaft 6 from being pulled out and fixed. Assembling work is simple and easy, and work such as assembling parts such as retaining rings and retaining pins as in the conventional example or caulking the protruding side end of the shaft 6 is required. This eliminates the need for assembly work and reduces the number of assembly steps and parts, and improves workability.

Moreover, without using metal parts such as the retaining ring and retaining pin, only the shaft 6 is inserted and fixed in place so that it is lighter than the casters of the conventional product and can be run. Since the load applied to the ground contact portion of the roller 4 is reduced, the wear of the traveling roller 4 is reduced, the life is extended, and the durability can be improved.

Further, the caps 7, 7 are fitted and fixed in the fitting recesses 5c, 5c formed in the left and right wall parts 5, 5 so that the shafts projecting to the center of the fitting recesses 5c, 5c. The head portion 6b and the tip portion 6c of 6 can be surely covered by the caps 7 and 7, and it is possible to prevent mud and dust from adhering to the head portion 6b and the tip portion 6c of the shaft 6 during traveling. it can.

FIG. 8 shows a second fitting structure in which the cap 7 is fitted and fixed to the fitting recess 5 c of the wall portion 5, and for example, at two places or three places on the fitting side peripheral portion of the cap 7. .. are formed at appropriate intervals in the circumferential direction, and the fitting recesses 5c of the wall portion 5 face the locking projections 7e of the same cap 7. An appropriate number of locking recesses 5e ... Are formed on the inner peripheral edge of the. That is, the locking recesses formed in the fitting recesses 5c of the wall part 5 by forcibly reducing the entire size of the cap 7 and fitting the caps 7 into the fitting recesses 5c of the wall part 5. 5e and the respective locking projections 7e formed on the cap 7 are engaged with each other and fixedly fitted, so that the same effects and advantages as those of the above-described embodiment can be obtained, and the cap 7 shown in FIG. Also has a simple structure and can be easily molded and fitted.

FIG. 9 shows a third fitting structure in which the cap 7 is fitted and fixed to the fitting recess 5 c of the wall portion 5. The outer peripheral edge portion of the cap 7 is larger than the fitting recess 5 c of the wall portion 5. Is formed to have a slightly larger diameter, and the entire cap 7 is forcibly reduced in size and fitted into the fitting recess 5c of the wall 5 by the elasticity of the cap 7 itself. Since the outer peripheral surface portion of the cap 7 is pressed against the inner peripheral surface portion of the fitting concave portion 5c formed in No. 5 in the radial direction so as to be fixedly fitted, the same effect as that of the above-described embodiment can be obtained, The structure is simpler than that of the cap 7 shown in FIG. 8, and molding and fitting can be performed easily.

FIG. 10 shows another mounting method for fixing the traveling caster 1 to the mounting frame 11 of the gate 10. The mounting shaft 12 is attached to the insertion portion 8 of the caster main body 2 constituting the traveling caster 1. Is fixed so that it can rotate freely, and a fixing member (not shown) such as a bolt or a screw is inserted through each mounting hole 13a of the mounting bracket 13 fixed to the upper end of the mounting shaft 12 to mount the gate 10 mounting frame. The traveling caster 1 may be attached to 11.

In the correspondence between the configuration of the present invention and the above-described embodiment, the storage portion of the present invention corresponds to the roller storage portion 3 of the embodiment, and similarly, the running wheels are the running rollers 4 of the embodiment. The support shaft corresponds to the shaft 6, but the present invention is not limited to the configuration of the above-described embodiment.

In the above-described embodiment, the traveling casters 1 are used to open and close the garage gate 10. However, for example, the traveling casters 1 are also used to move furniture such as chairs and desks. Can be used.

[Submission date] June 28, 1994

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

A traveling caster according to claim 2 is, in addition to the configuration according to claim 1, characterized in that the tip end portion of the above-mentioned support shaft is inserted in a direction to be inserted into the one bearing hole side. It is characterized in that the tip end of the is formed in a tapered shape.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

A traveling caster according to a third aspect of the present invention is, in addition to the configuration of the first aspect, a support shaft in a direction in which a tip end portion of the support shaft is inserted into the one bearing hole side. It is characterized in that the front end of the is divided into a plurality of parts.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

A traveling caster according to a second aspect of the invention is, in addition to the operation of the first aspect of the invention, a bearing hole that is formed on one wall portion side of the caster main body and the other wall portion side through the bearing hole. Since the tapered side of the support shaft is inserted into the bearing hole formed in, the support shaft can be easily inserted.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

A traveling caster according to a third aspect of the invention is, in addition to the action of the first aspect of the invention, a bearing hole formed on one wall portion side of the caster main body and the other wall portion side. Since the tip of the support shaft is forcibly inserted into the bearing hole formed on the side wall, and the tip of the support shaft is reduced in diameter so that it can be inserted into the bearing hole in the side wall, Easy to insert.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an assembly structure of a traveling caster.

FIG. 2 is a vertical sectional side view showing an assembly structure of a traveling caster.

FIG. 3 is an exploded perspective view showing a method of assembling a traveling caster.

FIG. 4 is an overall perspective view of a traveling caster showing a mounting method of the present invention.

FIG. 5 is a perspective view of a shaft showing the insertion structure of the present invention.

FIG. 6 is a perspective view of a shaft showing another embodiment of the insertion structure.

FIG. 7 is a sectional view of the fitting portion of the cap showing the first fitting structure.

FIG. 8 is a sectional view of a fitting portion of a cap showing a second fitting structure.

FIG. 9 is a sectional view of a fitting portion of a cap showing a third fitting structure.

FIG. 10 is an overall perspective view of a traveling caster showing another mounting method.

FIG. 11 is a front view of a gate showing a mounting state of a traveling caster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Caster for traveling 2 ... Caster main body 3 ... Roller storage part 4 ... Traveling roller 4a ... Insertion hole 5 ... Wall parts 5a, 5b ... Bearing hole 5c ... Fitting recess 5d ... Locking hole 5e ... Locking recess 6 ... Shaft 6d ... Locking groove 7 ... Cap 7a ... Locking piece 7e ... Locking protrusion

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[Procedure amendment]

[Submission date] June 28, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (5)

[Scope of utility model registration request] 1. A vehicle for traveling, in which a running wheel is housed in a lower housing portion of a caster body, and a support shaft is inserted from one side into a through hole formed at a center of rotation of the running wheel so as to be freely rotatable. In the caster, each bearing hole for inserting the support shaft in the axial direction is formed in both side wall portions of the housing portion, and the one bearing hole is formed to have a diameter slightly smaller than the shaft portion of the support shaft, A running caster in which a locking groove that engages with the bearing hole of the wall portion is formed on the tip-side shaft peripheral surface of the support shaft that is inserted into the one bearing hole side. 2. The support shaft according to claim 1, wherein the front end portion of the support shaft is formed in a tapered shape in a direction to be inserted into the one bearing hole side. 3. The support shaft according to claim 1, wherein the support shaft has a distal end portion divided into a plurality of portions in a direction to be inserted into the one bearing hole side. 4. A fitting recess for fitting and fixing a lid is formed in a central portion of an outer surface side of the wall centering on a bearing hole formed in one side wall of the housing, and the fitting recess. A locking piece and a locking hole for locking each other are formed in the opposing peripheral edge portions of the lid and the lid, and the locking piece is divided into left and right parts with respect to the inserting direction, and the locking piece is divided into left and right parts. 2. The traveling caster according to claim 1, wherein each of the supporting pieces is formed with a retaining claw that is circumferentially locked with respect to the insertion side edge of the locking hole. 5. A fitting recess for fitting and fixing a lid is formed in a central portion of an outer surface side of the wall centering on a bearing hole formed in one side wall of the housing, and the fitting recess. The traveling caster according to claim 1, wherein a locking projection and a locking recess are formed on the opposite peripheral edges of the cover and the lid, the locking projection and the locking recess engaging with each other.