The ornamental design for a collapsibleshelteranchor, as shown and described.
FIG. 1 is an angled perspective view of a collapsible shelter anchor of the present disclosure;
FIG. 2 is a perspective view of the collapsible shelter anchor of FIG. 1 in a biased closed configuration;
FIG. 3 is a top view of a collapsible shelter anchor of the present disclosure;
FIG. 4 is a bottom view of a collapsible shelter anchor of the present disclosure;
FIG. 5 is an angled perspective view of a collapsible shelter anchor of the present disclosure in a biased closed configuration;
FIG. 6 is a perspective view of an embodiment of the collapsible shelter anchor of FIG. 1 in a biased closed configuration where a first releasably engageable body and a second releasably engageable body are releasably engaged;
FIG. 7 is a perspective view of the collapsible shelter anchor of FIG. 6 in a biased closed configuration where a first releasably engageable body and a second releasably engageable body are releasably engaged and a coupling mechanism is received by a first eyelet and a second eyelet. The broken line showing of the coupling mechanism is for the purpose of illustrating environmental structure and forms no part of the claimed design; and,
FIG. 8 is an angled perspective top view of a collapsible shelter with collapsible shelter anchors filled with matter and releasably coupled via coupling mechanisms proximal to the vertical support legs of the collapsible shelter. The broken line showing of the coupling mechanisms and the collapsible shelter is for the purpose of illustrating environmental structure and forms no part of the claimed design.